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diff --git a/chromium/net/proxy/proxy_resolver_script_data.h b/chromium/net/proxy/proxy_resolver_script_data.h
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+++ b/chromium/net/proxy/proxy_resolver_script_data.h
@@ -0,0 +1,74 @@
+// 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.
+
+#ifndef NET_PROXY_PROXY_RESOLVER_SCRIPT_DATA_H_
+#define NET_PROXY_PROXY_RESOLVER_SCRIPT_DATA_H_
+
+#include "base/memory/ref_counted.h"
+#include "base/strings/string16.h"
+#include "net/base/net_export.h"
+#include "url/gurl.h"
+
+namespace net {
+
+// Reference-counted wrapper for passing around a PAC script specification.
+// The PAC script can be either specified via a URL, a deferred URL for
+// auto-detect, or the actual javascript program text.
+//
+// This is thread-safe so it can be used by multi-threaded implementations of
+// ProxyResolver to share the data between threads.
+class NET_EXPORT_PRIVATE ProxyResolverScriptData
+    : public base::RefCountedThreadSafe<ProxyResolverScriptData> {
+ public:
+  enum Type {
+    TYPE_SCRIPT_CONTENTS,
+    TYPE_SCRIPT_URL,
+    TYPE_AUTO_DETECT,
+  };
+
+  // Creates a script data given the UTF8 bytes of the content.
+  static scoped_refptr<ProxyResolverScriptData> FromUTF8(
+      const std::string& utf8);
+
+  // Creates a script data given the UTF16 bytes of the content.
+  static scoped_refptr<ProxyResolverScriptData> FromUTF16(
+      const base::string16& utf16);
+
+  // Creates a script data given a URL to the PAC script.
+  static scoped_refptr<ProxyResolverScriptData> FromURL(const GURL& url);
+
+  // Creates a script data for using an automatically detected PAC URL.
+  static scoped_refptr<ProxyResolverScriptData> ForAutoDetect();
+
+  Type type() const {
+    return type_;
+  }
+
+  // Returns the contents of the script as UTF16.
+  // (only valid for type() == TYPE_SCRIPT_CONTENTS).
+  const base::string16& utf16() const;
+
+  // Returns the URL of the script.
+  // (only valid for type() == TYPE_SCRIPT_URL).
+  const GURL& url() const;
+
+  // Returns true if |this| matches |other|.
+  bool Equals(const ProxyResolverScriptData* other) const;
+
+ private:
+  friend class base::RefCountedThreadSafe<ProxyResolverScriptData>;
+  ProxyResolverScriptData(Type type,
+                          const GURL& url,
+                          const base::string16& utf16);
+  virtual ~ProxyResolverScriptData();
+
+
+  const Type type_;
+  const GURL url_;
+  const base::string16 utf16_;
+};
+
+}  // namespace net
+
+#endif  // NET_PROXY_PROXY_RESOLVER_SCRIPT_DATA_H_