Add files to the snapshot for error pages support

As we'll be using a few more files from the chrome layer.

Change-Id: I8008b44d0dba42d7531e6c8fbc0ec050ecca736a
Reviewed-by: Jocelyn Turcotte <jocelyn.turcotte@digia.com>

4 files changed, 998 insertions, 0 deletions

diff --git a/chromium/chrome/common/localized_error.cc b/chromium/chrome/common/localized_error.cc
new file mode 100644
index 00000000000..4a90c898c4b
--- /dev/null
+++ b/chromium/chrome/common/localized_error.cc
@@ -0,0 +1,828 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/common/localized_error.h"
+
+#include "base/i18n/rtl.h"
+#include "base/logging.h"
+#include "base/strings/string16.h"
+#include "base/strings/string_number_conversions.h"
+#include "base/strings/string_util.h"
+#include "base/strings/utf_string_conversions.h"
+#include "base/values.h"
+#include "chrome/common/extensions/extension_constants.h"
+#include "chrome/common/extensions/extension_icon_set.h"
+#include "chrome/common/extensions/extension_set.h"
+#include "chrome/common/extensions/manifest_handlers/icons_handler.h"
+#include "chrome/common/net/net_error_info.h"
+#include "grit/chromium_strings.h"
+#include "grit/generated_resources.h"
+#include "net/base/escape.h"
+#include "net/base/net_errors.h"
+#include "net/base/net_util.h"
+#include "third_party/WebKit/public/platform/WebURLError.h"
+#include "ui/base/l10n/l10n_util.h"
+#include "ui/base/webui/web_ui_util.h"
+#include "url/gurl.h"
+
+#if defined(OS_WIN)
+#include "base/win/windows_version.h"
+#endif
+
+using blink::WebURLError;
+
+// Some error pages have no details.
+const unsigned int kErrorPagesNoDetails = 0;
+
+namespace {
+
+static const char kRedirectLoopLearnMoreUrl[] =
+    "https://www.google.com/support/chrome/bin/answer.py?answer=95626";
+static const char kWeakDHKeyLearnMoreUrl[] =
+    "http://sites.google.com/a/chromium.org/dev/"
+    "err_ssl_weak_server_ephemeral_dh_key";
+#if defined(OS_CHROMEOS)
+static const char kAppWarningLearnMoreUrl[] =
+    "chrome-extension://honijodknafkokifofgiaalefdiedpko/main.html"
+    "?answer=1721911";
+#endif  // defined(OS_CHROMEOS)
+
+enum NAV_SUGGESTIONS {
+  SUGGEST_NONE                  = 0,
+  SUGGEST_RELOAD                = 1 << 0,
+  SUGGEST_CHECK_CONNECTION      = 1 << 1,
+  SUGGEST_DNS_CONFIG            = 1 << 2,
+  SUGGEST_FIREWALL_CONFIG       = 1 << 3,
+  SUGGEST_PROXY_CONFIG          = 1 << 4,
+  SUGGEST_DISABLE_EXTENSION     = 1 << 5,
+  SUGGEST_LEARNMORE             = 1 << 6,
+  SUGGEST_VIEW_POLICIES         = 1 << 7,
+  SUGGEST_CONTACT_ADMINISTRATOR = 1 << 8,
+};
+
+struct LocalizedErrorMap {
+  int error_code;
+  unsigned int title_resource_id;
+  unsigned int heading_resource_id;
+  // Detailed summary used when the error is in the main frame.
+  unsigned int summary_resource_id;
+  // Short one sentence description shown on mouse over when the error is in
+  // a frame.
+  unsigned int details_resource_id;
+  int suggestions;  // Bitmap of SUGGEST_* values.
+};
+
+const LocalizedErrorMap net_error_options[] = {
+  {net::ERR_TIMED_OUT,
+   IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
+   IDS_ERRORPAGES_HEADING_NOT_AVAILABLE,
+   IDS_ERRORPAGES_SUMMARY_TIMED_OUT,
+   IDS_ERRORPAGES_DETAILS_TIMED_OUT,
+   SUGGEST_RELOAD | SUGGEST_CHECK_CONNECTION | SUGGEST_FIREWALL_CONFIG |
+       SUGGEST_PROXY_CONFIG,
+  },
+  {net::ERR_CONNECTION_TIMED_OUT,
+   IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
+   IDS_ERRORPAGES_HEADING_NOT_AVAILABLE,
+   IDS_ERRORPAGES_SUMMARY_TIMED_OUT,
+   IDS_ERRORPAGES_DETAILS_TIMED_OUT,
+   SUGGEST_RELOAD | SUGGEST_CHECK_CONNECTION | SUGGEST_FIREWALL_CONFIG |
+       SUGGEST_PROXY_CONFIG,
+  },
+  {net::ERR_CONNECTION_CLOSED,
+   IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
+   IDS_ERRORPAGES_HEADING_NOT_AVAILABLE,
+   IDS_ERRORPAGES_SUMMARY_NOT_AVAILABLE,
+   IDS_ERRORPAGES_DETAILS_CONNECTION_CLOSED,
+   SUGGEST_RELOAD,
+  },
+  {net::ERR_CONNECTION_RESET,
+   IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
+   IDS_ERRORPAGES_HEADING_NOT_AVAILABLE,
+   IDS_ERRORPAGES_SUMMARY_CONNECTION_RESET,
+   IDS_ERRORPAGES_DETAILS_CONNECTION_RESET,
+   SUGGEST_RELOAD | SUGGEST_CHECK_CONNECTION | SUGGEST_FIREWALL_CONFIG |
+       SUGGEST_PROXY_CONFIG,
+  },
+  {net::ERR_CONNECTION_REFUSED,
+   IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
+   IDS_ERRORPAGES_HEADING_NOT_AVAILABLE,
+   IDS_ERRORPAGES_SUMMARY_CONNECTION_REFUSED,
+   IDS_ERRORPAGES_DETAILS_CONNECTION_REFUSED,
+   SUGGEST_RELOAD | SUGGEST_CHECK_CONNECTION | SUGGEST_FIREWALL_CONFIG |
+       SUGGEST_PROXY_CONFIG,
+  },
+  {net::ERR_CONNECTION_FAILED,
+   IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
+   IDS_ERRORPAGES_HEADING_NOT_AVAILABLE,
+   IDS_ERRORPAGES_SUMMARY_NOT_AVAILABLE,
+   IDS_ERRORPAGES_DETAILS_CONNECTION_FAILED,
+   SUGGEST_RELOAD,
+  },
+  {net::ERR_NAME_NOT_RESOLVED,
+   IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
+   IDS_ERRORPAGES_HEADING_NOT_AVAILABLE,
+   IDS_ERRORPAGES_SUMMARY_NAME_NOT_RESOLVED,
+   IDS_ERRORPAGES_DETAILS_NAME_NOT_RESOLVED,
+   SUGGEST_RELOAD | SUGGEST_CHECK_CONNECTION | SUGGEST_DNS_CONFIG |
+       SUGGEST_FIREWALL_CONFIG | SUGGEST_PROXY_CONFIG,
+  },
+  {net::ERR_ADDRESS_UNREACHABLE,
+   IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
+   IDS_ERRORPAGES_HEADING_NOT_AVAILABLE,
+   IDS_ERRORPAGES_SUMMARY_ADDRESS_UNREACHABLE,
+   IDS_ERRORPAGES_DETAILS_ADDRESS_UNREACHABLE,
+   SUGGEST_RELOAD | SUGGEST_FIREWALL_CONFIG | SUGGEST_PROXY_CONFIG,
+  },
+  {net::ERR_NETWORK_ACCESS_DENIED,
+   IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
+   IDS_ERRORPAGES_HEADING_NETWORK_ACCESS_DENIED,
+   IDS_ERRORPAGES_SUMMARY_NETWORK_ACCESS_DENIED,
+   IDS_ERRORPAGES_DETAILS_NETWORK_ACCESS_DENIED,
+   SUGGEST_FIREWALL_CONFIG,
+  },
+  {net::ERR_PROXY_CONNECTION_FAILED,
+   IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
+   IDS_ERRORPAGES_HEADING_PROXY_CONNECTION_FAILED,
+   IDS_ERRORPAGES_SUMMARY_PROXY_CONNECTION_FAILED,
+   IDS_ERRORPAGES_DETAILS_PROXY_CONNECTION_FAILED,
+   SUGGEST_PROXY_CONFIG,
+  },
+  {net::ERR_INTERNET_DISCONNECTED,
+   IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
+   IDS_ERRORPAGES_HEADING_INTERNET_DISCONNECTED,
+   IDS_ERRORPAGES_SUMMARY_INTERNET_DISCONNECTED,
+   IDS_ERRORPAGES_DETAILS_INTERNET_DISCONNECTED,
+   SUGGEST_NONE,
+  },
+  {net::ERR_FILE_NOT_FOUND,
+   IDS_ERRORPAGES_TITLE_NOT_FOUND,
+   IDS_ERRORPAGES_HEADING_NOT_FOUND,
+   IDS_ERRORPAGES_SUMMARY_NOT_FOUND,
+   IDS_ERRORPAGES_DETAILS_FILE_NOT_FOUND,
+   SUGGEST_NONE,
+  },
+  {net::ERR_CACHE_MISS,
+   IDS_ERRORPAGES_TITLE_LOAD_FAILED,
+   IDS_ERRORPAGES_HEADING_CACHE_MISS,
+   IDS_ERRORPAGES_SUMMARY_CACHE_MISS,
+   IDS_ERRORPAGES_DETAILS_CACHE_MISS,
+   SUGGEST_RELOAD,
+  },
+  {net::ERR_CACHE_READ_FAILURE,
+   IDS_ERRORPAGES_TITLE_LOAD_FAILED,
+   IDS_ERRORPAGES_HEADING_CACHE_READ_FAILURE,
+   IDS_ERRORPAGES_SUMMARY_CACHE_READ_FAILURE,
+   IDS_ERRORPAGES_DETAILS_CACHE_READ_FAILURE,
+   SUGGEST_RELOAD,
+  },
+  {net::ERR_NETWORK_IO_SUSPENDED,
+   IDS_ERRORPAGES_TITLE_LOAD_FAILED,
+   IDS_ERRORPAGES_HEADING_NETWORK_IO_SUSPENDED,
+   IDS_ERRORPAGES_SUMMARY_NETWORK_IO_SUSPENDED,
+   IDS_ERRORPAGES_DETAILS_NETWORK_IO_SUSPENDED,
+   SUGGEST_RELOAD,
+  },
+  {net::ERR_TOO_MANY_REDIRECTS,
+   IDS_ERRORPAGES_TITLE_LOAD_FAILED,
+   IDS_ERRORPAGES_HEADING_TOO_MANY_REDIRECTS,
+   IDS_ERRORPAGES_SUMMARY_TOO_MANY_REDIRECTS,
+   IDS_ERRORPAGES_DETAILS_TOO_MANY_REDIRECTS,
+   SUGGEST_RELOAD | SUGGEST_LEARNMORE,
+  },
+  {net::ERR_EMPTY_RESPONSE,
+   IDS_ERRORPAGES_TITLE_LOAD_FAILED,
+   IDS_ERRORPAGES_HEADING_EMPTY_RESPONSE,
+   IDS_ERRORPAGES_SUMMARY_EMPTY_RESPONSE,
+   IDS_ERRORPAGES_DETAILS_EMPTY_RESPONSE,
+   SUGGEST_RELOAD,
+  },
+  {net::ERR_RESPONSE_HEADERS_MULTIPLE_CONTENT_LENGTH,
+   IDS_ERRORPAGES_TITLE_LOAD_FAILED,
+   IDS_ERRORPAGES_HEADING_DUPLICATE_HEADERS,
+   IDS_ERRORPAGES_SUMMARY_DUPLICATE_HEADERS,
+   IDS_ERRORPAGES_DETAILS_RESPONSE_HEADERS_MULTIPLE_CONTENT_LENGTH,
+   SUGGEST_NONE,
+  },
+  {net::ERR_RESPONSE_HEADERS_MULTIPLE_CONTENT_DISPOSITION,
+   IDS_ERRORPAGES_TITLE_LOAD_FAILED,
+   IDS_ERRORPAGES_HEADING_DUPLICATE_HEADERS,
+   IDS_ERRORPAGES_SUMMARY_DUPLICATE_HEADERS,
+   IDS_ERRORPAGES_DETAILS_RESPONSE_HEADERS_MULTIPLE_CONTENT_DISPOSITION,
+   SUGGEST_NONE,
+  },
+  {net::ERR_RESPONSE_HEADERS_MULTIPLE_LOCATION,
+   IDS_ERRORPAGES_TITLE_LOAD_FAILED,
+   IDS_ERRORPAGES_HEADING_DUPLICATE_HEADERS,
+   IDS_ERRORPAGES_SUMMARY_DUPLICATE_HEADERS,
+   IDS_ERRORPAGES_DETAILS_RESPONSE_HEADERS_MULTIPLE_LOCATION,
+   SUGGEST_NONE,
+  },
+  {net::ERR_CONTENT_LENGTH_MISMATCH,
+   IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
+   IDS_ERRORPAGES_HEADING_NOT_AVAILABLE,
+   IDS_ERRORPAGES_SUMMARY_NOT_AVAILABLE,
+   IDS_ERRORPAGES_DETAILS_CONNECTION_CLOSED,
+   SUGGEST_RELOAD,
+  },
+  {net::ERR_INCOMPLETE_CHUNKED_ENCODING,
+   IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
+   IDS_ERRORPAGES_HEADING_NOT_AVAILABLE,
+   IDS_ERRORPAGES_SUMMARY_NOT_AVAILABLE,
+   IDS_ERRORPAGES_DETAILS_CONNECTION_CLOSED,
+   SUGGEST_RELOAD,
+  },
+  {net::ERR_SSL_PROTOCOL_ERROR,
+   IDS_ERRORPAGES_TITLE_LOAD_FAILED,
+   IDS_ERRORPAGES_HEADING_SSL_PROTOCOL_ERROR,
+   IDS_ERRORPAGES_SUMMARY_SSL_PROTOCOL_ERROR,
+   IDS_ERRORPAGES_DETAILS_SSL_PROTOCOL_ERROR,
+   SUGGEST_NONE,
+  },
+  {net::ERR_SSL_UNSAFE_NEGOTIATION,
+   IDS_ERRORPAGES_TITLE_LOAD_FAILED,
+   IDS_ERRORPAGES_HEADING_SSL_PROTOCOL_ERROR,
+   IDS_ERRORPAGES_SUMMARY_SSL_PROTOCOL_ERROR,
+   IDS_ERRORPAGES_DETAILS_SSL_UNSAFE_NEGOTIATION,
+   SUGGEST_NONE,
+  },
+  {net::ERR_BAD_SSL_CLIENT_AUTH_CERT,
+   IDS_ERRORPAGES_TITLE_LOAD_FAILED,
+   IDS_ERRORPAGES_HEADING_BAD_SSL_CLIENT_AUTH_CERT,
+   IDS_ERRORPAGES_SUMMARY_BAD_SSL_CLIENT_AUTH_CERT,
+   IDS_ERRORPAGES_DETAILS_BAD_SSL_CLIENT_AUTH_CERT,
+   SUGGEST_NONE,
+  },
+  {net::ERR_SSL_WEAK_SERVER_EPHEMERAL_DH_KEY,
+   IDS_ERRORPAGES_TITLE_LOAD_FAILED,
+   IDS_ERRORPAGES_HEADING_WEAK_SERVER_EPHEMERAL_DH_KEY,
+   IDS_ERRORPAGES_SUMMARY_WEAK_SERVER_EPHEMERAL_DH_KEY,
+   IDS_ERRORPAGES_DETAILS_SSL_PROTOCOL_ERROR,
+   SUGGEST_LEARNMORE,
+  },
+  {net::ERR_SSL_PINNED_KEY_NOT_IN_CERT_CHAIN,
+   IDS_ERRORPAGES_TITLE_LOAD_FAILED,
+   IDS_ERRORPAGES_HEADING_PINNING_FAILURE,
+   IDS_ERRORPAGES_SUMMARY_PINNING_FAILURE,
+   IDS_ERRORPAGES_DETAILS_PINNING_FAILURE,
+   SUGGEST_NONE,
+  },
+  {net::ERR_TEMPORARILY_THROTTLED,
+   IDS_ERRORPAGES_TITLE_ACCESS_DENIED,
+   IDS_ERRORPAGES_HEADING_ACCESS_DENIED,
+   IDS_ERRORPAGES_SUMMARY_TEMPORARILY_THROTTLED,
+   IDS_ERRORPAGES_DETAILS_TEMPORARILY_THROTTLED,
+   SUGGEST_NONE,
+  },
+  {net::ERR_BLOCKED_BY_CLIENT,
+   IDS_ERRORPAGES_TITLE_BLOCKED,
+   IDS_ERRORPAGES_HEADING_BLOCKED,
+   IDS_ERRORPAGES_SUMMARY_BLOCKED,
+   IDS_ERRORPAGES_DETAILS_BLOCKED,
+   SUGGEST_RELOAD | SUGGEST_DISABLE_EXTENSION,
+  },
+  {net::ERR_NETWORK_CHANGED,
+   IDS_ERRORPAGES_TITLE_LOAD_FAILED,
+   IDS_ERRORPAGES_HEADING_NETWORK_ACCESS_DENIED,
+   IDS_ERRORPAGES_SUMMARY_NETWORK_CHANGED,
+   IDS_ERRORPAGES_DETAILS_NETWORK_CHANGED,
+   SUGGEST_RELOAD | SUGGEST_CHECK_CONNECTION,
+  },
+  {net::ERR_BLOCKED_BY_ADMINISTRATOR,
+   IDS_ERRORPAGES_TITLE_BLOCKED,
+   IDS_ERRORPAGES_HEADING_BLOCKED_BY_ADMINISTRATOR,
+   IDS_ERRORPAGES_SUMMARY_BLOCKED_BY_ADMINISTRATOR,
+   IDS_ERRORPAGES_DETAILS_BLOCKED_BY_ADMINISTRATOR,
+   SUGGEST_VIEW_POLICIES | SUGGEST_CONTACT_ADMINISTRATOR,
+  },
+};
+
+// Special error page to be used in the case of navigating back to a page
+// generated by a POST.  LocalizedError::HasStrings expects this net error code
+// to also appear in the array above.
+const LocalizedErrorMap repost_error = {
+  net::ERR_CACHE_MISS,
+  IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
+  IDS_HTTP_POST_WARNING_TITLE,
+  IDS_ERRORPAGES_HTTP_POST_WARNING,
+  IDS_ERRORPAGES_DETAILS_CACHE_MISS,
+  SUGGEST_RELOAD,
+};
+
+const LocalizedErrorMap http_error_options[] = {
+  {403,
+   IDS_ERRORPAGES_TITLE_ACCESS_DENIED,
+   IDS_ERRORPAGES_HEADING_ACCESS_DENIED,
+   IDS_ERRORPAGES_SUMMARY_FORBIDDEN,
+   IDS_ERRORPAGES_DETAILS_FORBIDDEN,
+   SUGGEST_NONE,
+  },
+  {410,
+   IDS_ERRORPAGES_TITLE_NOT_FOUND,
+   IDS_ERRORPAGES_HEADING_NOT_FOUND,
+   IDS_ERRORPAGES_SUMMARY_GONE,
+   IDS_ERRORPAGES_DETAILS_GONE,
+   SUGGEST_NONE,
+  },
+
+  {500,
+   IDS_ERRORPAGES_TITLE_LOAD_FAILED,
+   IDS_ERRORPAGES_HEADING_HTTP_SERVER_ERROR,
+   IDS_ERRORPAGES_SUMMARY_INTERNAL_SERVER_ERROR,
+   IDS_ERRORPAGES_DETAILS_INTERNAL_SERVER_ERROR,
+   SUGGEST_RELOAD,
+  },
+  {501,
+   IDS_ERRORPAGES_TITLE_LOAD_FAILED,
+   IDS_ERRORPAGES_HEADING_HTTP_SERVER_ERROR,
+   IDS_ERRORPAGES_SUMMARY_WEBSITE_CANNOT_HANDLE,
+   IDS_ERRORPAGES_DETAILS_NOT_IMPLEMENTED,
+   SUGGEST_NONE,
+  },
+  {502,
+   IDS_ERRORPAGES_TITLE_LOAD_FAILED,
+   IDS_ERRORPAGES_HEADING_HTTP_SERVER_ERROR,
+   IDS_ERRORPAGES_SUMMARY_BAD_GATEWAY,
+   IDS_ERRORPAGES_DETAILS_BAD_GATEWAY,
+   SUGGEST_RELOAD,
+  },
+  {503,
+   IDS_ERRORPAGES_TITLE_LOAD_FAILED,
+   IDS_ERRORPAGES_HEADING_HTTP_SERVER_ERROR,
+   IDS_ERRORPAGES_SUMMARY_SERVICE_UNAVAILABLE,
+   IDS_ERRORPAGES_DETAILS_SERVICE_UNAVAILABLE,
+   SUGGEST_RELOAD,
+  },
+  {504,
+   IDS_ERRORPAGES_TITLE_LOAD_FAILED,
+   IDS_ERRORPAGES_HEADING_HTTP_SERVER_ERROR,
+   IDS_ERRORPAGES_SUMMARY_GATEWAY_TIMEOUT,
+   IDS_ERRORPAGES_DETAILS_GATEWAY_TIMEOUT,
+   SUGGEST_RELOAD,
+  },
+  {505,
+   IDS_ERRORPAGES_TITLE_LOAD_FAILED,
+   IDS_ERRORPAGES_HEADING_HTTP_SERVER_ERROR,
+   IDS_ERRORPAGES_SUMMARY_WEBSITE_CANNOT_HANDLE,
+   IDS_ERRORPAGES_DETAILS_HTTP_VERSION_NOT_SUPPORTED,
+   SUGGEST_NONE,
+  },
+};
+
+const LocalizedErrorMap dns_probe_error_options[] = {
+  {chrome_common_net::DNS_PROBE_POSSIBLE,
+   IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
+   IDS_ERRORPAGES_HEADING_NOT_AVAILABLE,
+   IDS_ERRORPAGES_SUMMARY_DNS_PROBE_RUNNING,
+   IDS_ERRORPAGES_DETAILS_DNS_PROBE_RUNNING,
+   SUGGEST_RELOAD,
+  },
+
+  // DNS_PROBE_NOT_RUN is not here; NetErrorHelper will restore the original
+  // error, which might be one of several DNS-related errors.
+
+  {chrome_common_net::DNS_PROBE_STARTED,
+   IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
+   IDS_ERRORPAGES_HEADING_NOT_AVAILABLE,
+   IDS_ERRORPAGES_SUMMARY_DNS_PROBE_RUNNING,
+   IDS_ERRORPAGES_DETAILS_DNS_PROBE_RUNNING,
+   // Include SUGGEST_RELOAD so the More button doesn't jump when we update.
+   SUGGEST_RELOAD,
+  },
+
+  // DNS_PROBE_FINISHED_UNKNOWN is not here; NetErrorHelper will restore the
+  // original error, which might be one of several DNS-related errors.
+
+  {chrome_common_net::DNS_PROBE_FINISHED_NO_INTERNET,
+   IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
+   IDS_ERRORPAGES_HEADING_INTERNET_DISCONNECTED,
+   IDS_ERRORPAGES_SUMMARY_INTERNET_DISCONNECTED,
+   IDS_ERRORPAGES_DETAILS_INTERNET_DISCONNECTED,
+   SUGGEST_RELOAD | SUGGEST_CHECK_CONNECTION | SUGGEST_FIREWALL_CONFIG,
+  },
+  {chrome_common_net::DNS_PROBE_FINISHED_BAD_CONFIG,
+   IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
+   IDS_ERRORPAGES_HEADING_NOT_AVAILABLE,
+   IDS_ERRORPAGES_SUMMARY_NAME_NOT_RESOLVED,
+   IDS_ERRORPAGES_DETAILS_NAME_NOT_RESOLVED,
+   SUGGEST_RELOAD | SUGGEST_DNS_CONFIG | SUGGEST_FIREWALL_CONFIG,
+  },
+  {chrome_common_net::DNS_PROBE_FINISHED_NXDOMAIN,
+   IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
+   IDS_ERRORPAGES_HEADING_NOT_AVAILABLE,
+   IDS_ERRORPAGES_SUMMARY_NAME_NOT_RESOLVED,
+   IDS_ERRORPAGES_DETAILS_NAME_NOT_RESOLVED,
+   SUGGEST_RELOAD,
+  },
+};
+
+const LocalizedErrorMap* FindErrorMapInArray(const LocalizedErrorMap* maps,
+                                                   size_t num_maps,
+                                                   int error_code) {
+  for (size_t i = 0; i < num_maps; ++i) {
+    if (maps[i].error_code == error_code)
+      return &maps[i];
+  }
+  return NULL;
+}
+
+const LocalizedErrorMap* LookupErrorMap(const std::string& error_domain,
+                                        int error_code, bool is_post) {
+  if (error_domain == net::kErrorDomain) {
+    // Display a different page in the special case of navigating through the
+    // history to an uncached page created by a POST.
+    if (is_post && error_code == net::ERR_CACHE_MISS)
+      return &repost_error;
+    return FindErrorMapInArray(net_error_options,
+                               arraysize(net_error_options),
+                               error_code);
+  } else if (error_domain == LocalizedError::kHttpErrorDomain) {
+    return FindErrorMapInArray(http_error_options,
+                               arraysize(http_error_options),
+                               error_code);
+  } else if (error_domain == chrome_common_net::kDnsProbeErrorDomain) {
+    const LocalizedErrorMap* map =
+        FindErrorMapInArray(dns_probe_error_options,
+                            arraysize(dns_probe_error_options),
+                            error_code);
+    DCHECK(map);
+    return map;
+  } else {
+    NOTREACHED();
+    return NULL;
+  }
+}
+
+bool LocaleIsRTL() {
+#if defined(TOOLKIT_GTK)
+  // base::i18n::IsRTL() uses the GTK text direction, which doesn't work within
+  // the renderer sandbox.
+  return base::i18n::ICUIsRTL();
+#else
+  return base::i18n::IsRTL();
+#endif
+}
+
+// Returns a dictionary containing the strings for the settings menu under the
+// wrench, and the advanced settings button.
+base::DictionaryValue* GetStandardMenuItemsText() {
+  base::DictionaryValue* standard_menu_items_text = new base::DictionaryValue();
+  standard_menu_items_text->SetString("settingsTitle",
+      l10n_util::GetStringUTF16(IDS_SETTINGS_TITLE));
+  standard_menu_items_text->SetString("advancedTitle",
+      l10n_util::GetStringUTF16(IDS_SETTINGS_SHOW_ADVANCED_SETTINGS));
+  return standard_menu_items_text;
+}
+
+// Gets the icon class for a given |error_domain| and |error_code|.
+const char* GetIconClassForError(const std::string& error_domain,
+                                 int error_code) {
+  if ((error_code == net::ERR_INTERNET_DISCONNECTED &&
+       error_domain == net::kErrorDomain) ||
+      (error_code == chrome_common_net::DNS_PROBE_FINISHED_NO_INTERNET &&
+       error_domain == chrome_common_net::kDnsProbeErrorDomain))
+    return "icon-offline";
+
+  return "icon-generic";
+}
+
+}  // namespace
+
+const char LocalizedError::kHttpErrorDomain[] = "http";
+
+void LocalizedError::GetStrings(int error_code,
+                                const std::string& error_domain,
+                                const GURL& failed_url,
+                                bool is_post,
+                                const std::string& locale,
+                                const std::string& accept_languages,
+                                base::DictionaryValue* error_strings) {
+  bool rtl = LocaleIsRTL();
+  error_strings->SetString("textdirection", rtl ? "rtl" : "ltr");
+
+  // Grab the strings and settings that depend on the error type.  Init
+  // options with default values.
+  LocalizedErrorMap options = {
+    0,
+    IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
+    IDS_ERRORPAGES_HEADING_NOT_AVAILABLE,
+    IDS_ERRORPAGES_SUMMARY_NOT_AVAILABLE,
+    kErrorPagesNoDetails,
+    SUGGEST_NONE,
+  };
+
+  const LocalizedErrorMap* error_map = LookupErrorMap(error_domain, error_code,
+                                                      is_post);
+  if (error_map)
+    options = *error_map;
+
+  // If we got "access denied" but the url was a file URL, then we say it was a
+  // file instead of just using the "not available" default message. Just adding
+  // ERR_ACCESS_DENIED to the map isn't sufficient, since that message may be
+  // generated by some OSs when the operation doesn't involve a file URL.
+  if (error_domain == net::kErrorDomain &&
+      error_code == net::ERR_ACCESS_DENIED &&
+      failed_url.scheme() == "file") {
+    options.title_resource_id = IDS_ERRORPAGES_TITLE_ACCESS_DENIED;
+    options.heading_resource_id = IDS_ERRORPAGES_HEADING_FILE_ACCESS_DENIED;
+    options.summary_resource_id = IDS_ERRORPAGES_SUMMARY_FILE_ACCESS_DENIED;
+    options.details_resource_id = IDS_ERRORPAGES_DETAILS_FILE_ACCESS_DENIED;
+    options.suggestions = SUGGEST_NONE;
+  }
+
+  base::string16 failed_url_string(net::FormatUrl(
+      failed_url, accept_languages, net::kFormatUrlOmitNothing,
+      net::UnescapeRule::NORMAL, NULL, NULL, NULL));
+  // URLs are always LTR.
+  if (rtl)
+    base::i18n::WrapStringWithLTRFormatting(&failed_url_string);
+  error_strings->SetString("title",
+      l10n_util::GetStringFUTF16(options.title_resource_id, failed_url_string));
+  error_strings->SetString("heading",
+      l10n_util::GetStringUTF16(options.heading_resource_id));
+
+  std::string icon_class = GetIconClassForError(error_domain, error_code);
+  error_strings->SetString("iconClass", icon_class);
+
+  base::DictionaryValue* summary = new base::DictionaryValue;
+  summary->SetString("msg",
+      l10n_util::GetStringUTF16(options.summary_resource_id));
+  summary->SetString("failedUrl", failed_url_string);
+  summary->SetString("hostName", net::IDNToUnicode(failed_url.host(),
+                                                   accept_languages));
+  summary->SetString("productName",
+                     l10n_util::GetStringUTF16(IDS_PRODUCT_NAME));
+
+  error_strings->SetString(
+      "more", l10n_util::GetStringUTF16(IDS_ERRORPAGES_BUTTON_MORE));
+  error_strings->SetString(
+      "less", l10n_util::GetStringUTF16(IDS_ERRORPAGES_BUTTON_LESS));
+  error_strings->Set("summary", summary);
+#if defined(OS_CHROMEOS)
+  error_strings->SetString(
+      "diagnose", l10n_util::GetStringUTF16(IDS_ERRORPAGES_BUTTON_DIAGNOSE));
+#endif  // defined(OS_CHROMEOS)
+
+  if (options.details_resource_id != kErrorPagesNoDetails) {
+    error_strings->SetString(
+        "errorDetails", l10n_util::GetStringUTF16(options.details_resource_id));
+  }
+
+  base::string16 error_string;
+  if (error_domain == net::kErrorDomain) {
+    // Non-internationalized error string, for debugging Chrome itself.
+    std::string ascii_error_string = net::ErrorToString(error_code);
+    // Remove the leading "net::" from the returned string.
+    base::RemoveChars(ascii_error_string, "net:", &ascii_error_string);
+    error_string = ASCIIToUTF16(ascii_error_string);
+  } else if (error_domain == chrome_common_net::kDnsProbeErrorDomain) {
+    std::string ascii_error_string =
+        chrome_common_net::DnsProbeStatusToString(error_code);
+    error_string = ASCIIToUTF16(ascii_error_string);
+  } else {
+    DCHECK_EQ(LocalizedError::kHttpErrorDomain, error_domain);
+    error_string = base::IntToString16(error_code);
+  }
+  error_strings->SetString("errorCode",
+      l10n_util::GetStringFUTF16(IDS_ERRORPAGES_ERROR_CODE, error_string));
+
+  base::ListValue* suggestions = new base::ListValue();
+
+  // Platform specific instructions for diagnosing network issues on OSX and
+  // Windows.
+#if defined(OS_MACOSX) || defined(OS_WIN)
+  if (error_domain == net::kErrorDomain &&
+      error_code == net::ERR_INTERNET_DISCONNECTED) {
+    int platform_string_id =
+        IDS_ERRORPAGES_SUMMARY_INTERNET_DISCONNECTED_PLATFORM;
+#if defined(OS_WIN)
+    // Different versions of Windows have different instructions.
+    base::win::Version windows_version = base::win::GetVersion();
+    if (windows_version < base::win::VERSION_VISTA) {
+      // XP, XP64, and Server 2003.
+      platform_string_id =
+          IDS_ERRORPAGES_SUMMARY_INTERNET_DISCONNECTED_PLATFORM_XP;
+    } else if (windows_version == base::win::VERSION_VISTA) {
+      // Vista
+      platform_string_id =
+          IDS_ERRORPAGES_SUMMARY_INTERNET_DISCONNECTED_PLATFORM_VISTA;
+    }
+#endif  // defined(OS_WIN)
+    // Lead with the general error description, and suffix with the platform
+    // dependent portion of the summary section.
+    summary->SetString("msg",
+        l10n_util::GetStringFUTF16(
+            IDS_ERRORPAGES_SUMMARY_INTERNET_DISCONNECTED_INSTRUCTIONS_TEMPLATE,
+            l10n_util::GetStringUTF16(options.summary_resource_id),
+            l10n_util::GetStringUTF16(platform_string_id)));
+  }
+#endif  // defined(OS_MACOSX) || defined(OS_WIN)
+
+  if (options.suggestions & SUGGEST_RELOAD) {
+    if (!is_post) {
+      base::DictionaryValue* reload_button = new base::DictionaryValue;
+      reload_button->SetString("msg",
+          l10n_util::GetStringUTF16(IDS_ERRORPAGES_BUTTON_RELOAD));
+      reload_button->SetString("reloadUrl", failed_url.spec());
+      error_strings->Set("reload", reload_button);
+    } else {
+      // If the page was created by a post, it can't be reloaded in the same
+      // way, so just add a suggestion instead.
+      // TODO(mmenke):  Make the reload button bring up the repost confirmation
+      //                dialog for pages resulting from posts.
+      base::DictionaryValue* suggest_reload_repost = new base::DictionaryValue;
+      suggest_reload_repost->SetString("header",
+          l10n_util::GetStringUTF16(
+              IDS_ERRORPAGES_SUGGESTION_RELOAD_REPOST_HEADER));
+      suggest_reload_repost->SetString("body",
+          l10n_util::GetStringUTF16(
+              IDS_ERRORPAGES_SUGGESTION_RELOAD_REPOST_BODY));
+      suggestions->Append(suggest_reload_repost);
+    }
+  }
+
+  if (options.suggestions & SUGGEST_CHECK_CONNECTION) {
+    base::DictionaryValue* suggest_check_connection = new base::DictionaryValue;
+    suggest_check_connection->SetString("header",
+        l10n_util::GetStringUTF16(
+            IDS_ERRORPAGES_SUGGESTION_CHECK_CONNECTION_HEADER));
+    suggest_check_connection->SetString("body",
+        l10n_util::GetStringUTF16(
+            IDS_ERRORPAGES_SUGGESTION_CHECK_CONNECTION_BODY));
+    suggestions->Append(suggest_check_connection);
+  }
+
+  if (options.suggestions & SUGGEST_DNS_CONFIG) {
+    base::DictionaryValue* suggest_dns_config = new base::DictionaryValue;
+    suggest_dns_config->SetString("header",
+        l10n_util::GetStringUTF16(
+            IDS_ERRORPAGES_SUGGESTION_DNS_CONFIG_HEADER));
+    suggest_dns_config->SetString("body",
+        l10n_util::GetStringUTF16(
+            IDS_ERRORPAGES_SUGGESTION_DNS_CONFIG_BODY));
+    suggestions->Append(suggest_dns_config);
+
+    base::DictionaryValue* suggest_network_prediction =
+        GetStandardMenuItemsText();
+    suggest_network_prediction->SetString("header",
+        l10n_util::GetStringUTF16(
+            IDS_ERRORPAGES_SUGGESTION_NETWORK_PREDICTION_HEADER));
+    suggest_network_prediction->SetString("body",
+        l10n_util::GetStringUTF16(
+            IDS_ERRORPAGES_SUGGESTION_NETWORK_PREDICTION_BODY));
+    suggest_network_prediction->SetString(
+        "noNetworkPredictionTitle",
+        l10n_util::GetStringUTF16(
+            IDS_NETWORK_PREDICTION_ENABLED_DESCRIPTION));
+    suggestions->Append(suggest_network_prediction);
+  }
+
+  if (options.suggestions & SUGGEST_FIREWALL_CONFIG) {
+    base::DictionaryValue* suggest_firewall_config = new base::DictionaryValue;
+    suggest_firewall_config->SetString("header",
+        l10n_util::GetStringUTF16(
+            IDS_ERRORPAGES_SUGGESTION_FIREWALL_CONFIG_HEADER));
+    suggest_firewall_config->SetString("body",
+        l10n_util::GetStringUTF16(
+            IDS_ERRORPAGES_SUGGESTION_FIREWALL_CONFIG_BODY));
+    suggestions->Append(suggest_firewall_config);
+  }
+
+  if (options.suggestions & SUGGEST_PROXY_CONFIG) {
+    base::DictionaryValue* suggest_proxy_config = GetStandardMenuItemsText();
+    suggest_proxy_config->SetString("header",
+        l10n_util::GetStringUTF16(
+            IDS_ERRORPAGES_SUGGESTION_PROXY_CONFIG_HEADER));
+    suggest_proxy_config->SetString("body",
+        l10n_util::GetStringFUTF16(IDS_ERRORPAGES_SUGGESTION_PROXY_CONFIG_BODY,
+            l10n_util::GetStringUTF16(
+                IDS_ERRORPAGES_SUGGESTION_PROXY_DISABLE_PLATFORM)));
+    suggest_proxy_config->SetString("proxyTitle",
+        l10n_util::GetStringUTF16(IDS_OPTIONS_PROXIES_CONFIGURE_BUTTON));
+
+    suggestions->Append(suggest_proxy_config);
+  }
+
+  if (options.suggestions & SUGGEST_DISABLE_EXTENSION) {
+    base::DictionaryValue* suggest_disable_extension =
+        new base::DictionaryValue;
+    // There's only a header for this suggestion.
+    suggest_disable_extension->SetString("header",
+        l10n_util::GetStringUTF16(
+            IDS_ERRORPAGES_SUGGESTION_DISABLE_EXTENSION_HEADER));
+    suggestions->Append(suggest_disable_extension);
+  }
+
+  if (options.suggestions & SUGGEST_VIEW_POLICIES) {
+    base::DictionaryValue* suggest_view_policies = new base::DictionaryValue;
+    suggest_view_policies->SetString(
+        "header",
+        l10n_util::GetStringUTF16(
+            IDS_ERRORPAGES_SUGGESTION_VIEW_POLICIES_HEADER));
+    suggest_view_policies->SetString(
+        "body",
+        l10n_util::GetStringUTF16(
+            IDS_ERRORPAGES_SUGGESTION_VIEW_POLICIES_BODY));
+    suggestions->Append(suggest_view_policies);
+  }
+
+  if (options.suggestions & SUGGEST_CONTACT_ADMINISTRATOR) {
+    base::DictionaryValue* suggest_contant_administrator =
+        new base::DictionaryValue;
+    suggest_contant_administrator->SetString(
+        "body",
+        l10n_util::GetStringUTF16(
+            IDS_ERRORPAGES_SUGGESTION_CONTACT_ADMINISTRATOR_BODY));
+    suggestions->Append(suggest_contant_administrator);
+  }
+
+  if (options.suggestions & SUGGEST_LEARNMORE) {
+    GURL learn_more_url;
+    switch (options.error_code) {
+      case net::ERR_TOO_MANY_REDIRECTS:
+        learn_more_url = GURL(kRedirectLoopLearnMoreUrl);
+        break;
+      case net::ERR_SSL_WEAK_SERVER_EPHEMERAL_DH_KEY:
+        learn_more_url = GURL(kWeakDHKeyLearnMoreUrl);
+        break;
+      default:
+        break;
+    }
+
+    if (learn_more_url.is_valid()) {
+      // Add the language parameter to the URL.
+      std::string query = learn_more_url.query() + "&hl=" + locale;
+      GURL::Replacements repl;
+      repl.SetQueryStr(query);
+      learn_more_url = learn_more_url.ReplaceComponents(repl);
+
+      base::DictionaryValue* suggest_learn_more = new base::DictionaryValue;
+      // There's only a body for this suggestion.
+      suggest_learn_more->SetString("body",
+          l10n_util::GetStringUTF16(IDS_ERRORPAGES_SUGGESTION_LEARNMORE_BODY));
+      suggest_learn_more->SetString("learnMoreUrl", learn_more_url.spec());
+      suggestions->Append(suggest_learn_more);
+    }
+  }
+
+  error_strings->Set("suggestions", suggestions);
+}
+
+base::string16 LocalizedError::GetErrorDetails(const blink::WebURLError& error,
+                                               bool is_post) {
+  const LocalizedErrorMap* error_map =
+      LookupErrorMap(error.domain.utf8(), error.reason, is_post);
+  if (error_map)
+    return l10n_util::GetStringUTF16(error_map->details_resource_id);
+  else
+    return l10n_util::GetStringUTF16(IDS_ERRORPAGES_DETAILS_UNKNOWN);
+}
+
+bool LocalizedError::HasStrings(const std::string& error_domain,
+                                int error_code) {
+  // Whether or not the there are strings for an error does not depend on
+  // whether or not the page was be generated by a POST, so just claim it was
+  // not.
+  return LookupErrorMap(error_domain, error_code, /*is_post=*/false) != NULL;
+}
+
+void LocalizedError::GetAppErrorStrings(
+    const GURL& display_url,
+    const extensions::Extension* app,
+    base::DictionaryValue* error_strings) {
+  DCHECK(app);
+
+  bool rtl = LocaleIsRTL();
+  error_strings->SetString("textdirection", rtl ? "rtl" : "ltr");
+
+  base::string16 failed_url(ASCIIToUTF16(display_url.spec()));
+  // URLs are always LTR.
+  if (rtl)
+    base::i18n::WrapStringWithLTRFormatting(&failed_url);
+  error_strings->SetString(
+     "url", l10n_util::GetStringFUTF16(IDS_ERRORPAGES_TITLE_NOT_AVAILABLE,
+                                       failed_url.c_str()));
+
+  error_strings->SetString("title", app->name());
+  error_strings->SetString(
+      "icon",
+      extensions::IconsInfo::GetIconURL(
+          app,
+          extension_misc::EXTENSION_ICON_GIGANTOR,
+          ExtensionIconSet::MATCH_SMALLER).spec());
+  error_strings->SetString("name", app->name());
+  error_strings->SetString(
+      "msg",
+      l10n_util::GetStringUTF16(IDS_ERRORPAGES_APP_WARNING));
+
+#if defined(OS_CHROMEOS)
+  GURL learn_more_url(kAppWarningLearnMoreUrl);
+  base::DictionaryValue* suggest_learn_more = new base::DictionaryValue();
+  suggest_learn_more->SetString("msg",
+                                l10n_util::GetStringUTF16(
+                                    IDS_ERRORPAGES_SUGGESTION_LEARNMORE_BODY));
+  suggest_learn_more->SetString("learnMoreUrl", learn_more_url.spec());
+  error_strings->Set("suggestionsLearnMore", suggest_learn_more);
+#endif  // defined(OS_CHROMEOS)
+}
diff --git a/chromium/chrome/common/localized_error.h b/chromium/chrome/common/localized_error.h
new file mode 100644
index 00000000000..a68407fada5
--- /dev/null
+++ b/chromium/chrome/common/localized_error.h
@@ -0,0 +1,60 @@
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_COMMON_LOCALIZED_ERROR_H_
+#define CHROME_COMMON_LOCALIZED_ERROR_H_
+
+#include <string>
+
+#include "base/basictypes.h"
+#include "base/strings/string16.h"
+
+class GURL;
+
+namespace base {
+class DictionaryValue;
+}
+
+namespace extensions {
+class Extension;
+}
+
+namespace blink {
+struct WebURLError;
+}
+
+class LocalizedError {
+ public:
+  // Fills |error_strings| with values to be used to build an error page used
+  // on HTTP errors, like 404 or connection reset.
+  static void GetStrings(int error_code,
+                         const std::string& error_domain,
+                         const GURL& failed_url,
+                         bool is_post,
+                         const std::string& locale,
+                         const std::string& accept_languages,
+                         base::DictionaryValue* strings);
+
+  // Returns a description of the encountered error.
+  static base::string16 GetErrorDetails(const blink::WebURLError& error,
+                                        bool is_post);
+
+  // Returns true if an error page exists for the specified parameters.
+  static bool HasStrings(const std::string& error_domain, int error_code);
+
+  // Fills |error_strings| with values to be used to build an error page used
+  // on HTTP errors, like 404 or connection reset, but using information from
+  // the associated |app| in order to make the error page look like it's more
+  // part of the app.
+  static void GetAppErrorStrings(const GURL& display_url,
+                                 const extensions::Extension* app,
+                                 base::DictionaryValue* error_strings);
+
+  static const char kHttpErrorDomain[];
+
+ private:
+  DISALLOW_IMPLICIT_CONSTRUCTORS(LocalizedError);
+};
+
+#endif  // CHROME_COMMON_LOCALIZED_ERROR_H_
diff --git a/chromium/chrome/common/net/net_error_info.cc b/chromium/chrome/common/net/net_error_info.cc
new file mode 100644
index 00000000000..91a1ca94bc9
--- /dev/null
+++ b/chromium/chrome/common/net/net_error_info.cc
@@ -0,0 +1,39 @@
+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/logging.h"
+#include "chrome/common/net/net_error_info.h"
+
+namespace chrome_common_net {
+
+const char kDnsProbeErrorDomain[] = "dnsprobe";
+
+const char* DnsProbeStatusToString(int status) {
+  switch (status) {
+  case DNS_PROBE_POSSIBLE:
+    return "DNS_PROBE_POSSIBLE";
+  case DNS_PROBE_NOT_RUN:
+    return "DNS_PROBE_NOT_RUN";
+  case DNS_PROBE_STARTED:
+    return "DNS_PROBE_STARTED";
+  case DNS_PROBE_FINISHED_INCONCLUSIVE:
+    return "DNS_PROBE_FINISHED_INCONCLUSIVE";
+  case DNS_PROBE_FINISHED_NO_INTERNET:
+    return "DNS_PROBE_FINISHED_NO_INTERNET";
+  case DNS_PROBE_FINISHED_BAD_CONFIG:
+    return "DNS_PROBE_FINISHED_BAD_CONFIG";
+  case DNS_PROBE_FINISHED_NXDOMAIN:
+    return "DNS_PROBE_FINISHED_NXDOMAIN";
+  default:
+    NOTREACHED();
+    return "";
+  }
+}
+
+bool DnsProbeStatusIsFinished(DnsProbeStatus status) {
+  return status >= DNS_PROBE_FINISHED_INCONCLUSIVE &&
+         status < DNS_PROBE_MAX;
+}
+
+}  // namespace chrome_common_net
diff --git a/chromium/chrome/common/net/net_error_info.h b/chromium/chrome/common/net/net_error_info.h
new file mode 100644
index 00000000000..1f69f7cd362
--- /dev/null
+++ b/chromium/chrome/common/net/net_error_info.h
@@ -0,0 +1,71 @@
+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_COMMON_NET_NET_ERROR_INFO_H_
+#define CHROME_COMMON_NET_NET_ERROR_INFO_H_
+
+namespace chrome_common_net {
+
+// The status of a DNS probe that the NetErrorTabHelper may or may not have
+// started.
+//
+// The DNS_PROBE_FINISHED_* values are used in histograms, so:
+// 1. FINISHED_UNKNOWN must remain the first FINISHED_* value.
+// 2. FINISHED_* values must not be rearranged relative to FINISHED_UNKNOWN.
+// 3. New FINISHED_* values must be inserted at the end.
+// 4. New non-FINISHED_* values cannot be inserted.
+enum DnsProbeStatus {
+  // A DNS probe may be run for this error page.  (This status is only used on
+  // the renderer side before it's received a status update from the browser.)
+  DNS_PROBE_POSSIBLE,
+
+  // A DNS probe will not be run for this error page.  (This happens if the
+  // user has the "Use web service to resolve navigation errors" preference
+  // turned off, or if probes are disabled by the field trial.)
+  DNS_PROBE_NOT_RUN,
+
+  // A DNS probe has been started for this error page.  The renderer should
+  // expect to receive another IPC with one of the FINISHED statuses once the
+  // probe has finished (as long as the error page is still loaded).
+  DNS_PROBE_STARTED,
+
+  // A DNS probe has finished with one of the following results:
+
+  // The probe was inconclusive.
+  DNS_PROBE_FINISHED_INCONCLUSIVE,
+
+  // There's no internet connection.
+  DNS_PROBE_FINISHED_NO_INTERNET,
+
+  // The DNS configuration is wrong, or the servers are down or broken.
+  DNS_PROBE_FINISHED_BAD_CONFIG,
+
+  // The DNS servers are working fine, so the domain must not exist.
+  DNS_PROBE_FINISHED_NXDOMAIN,
+
+  DNS_PROBE_MAX
+};
+
+// Returns a string representing |status|.  It should be simply the name of
+// the value as a string, but don't rely on that.  This is presented to the
+// user as part of the DNS error page (as the error code, at the bottom),
+// and is also used in some verbose log messages.
+//
+// |status| is an int because error codes are ints by the time they get to the
+// localized error system, and we don't want to require the caller to cast back
+// to a probe status.  The function will NOTREACHED() and return an empty
+// string if given an int that does not match a value in DnsProbeStatus (or if
+// it is DNS_PROBE_MAX, which is not a real status).
+const char* DnsProbeStatusToString(int status);
+
+// Returns true if |status| is one of the DNS_PROBE_FINISHED_* statuses.
+bool DnsProbeStatusIsFinished(DnsProbeStatus status);
+
+// The error domain used to pass DNS probe statuses to the localized error
+// code.
+extern const char kDnsProbeErrorDomain[];
+
+}  // namespace chrome_common_net
+
+#endif  // CHROME_COMMON_NET_NET_ERROR_INFO_H_