1 files changed, 66 insertions, 0 deletions
diff --git a/chromium/chrome/browser/signin/reauth_tab_helper.h b/chromium/chrome/browser/signin/reauth_tab_helper.h
new file mode 100644
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+++ b/chromium/chrome/browser/signin/reauth_tab_helper.h
@@ -0,0 +1,66 @@
+// Copyright 2020 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_BROWSER_SIGNIN_REAUTH_TAB_HELPER_H_
+#define CHROME_BROWSER_SIGNIN_REAUTH_TAB_HELPER_H_
+
+#include "base/callback.h"
+#include "content/public/browser/web_contents_observer.h"
+#include "content/public/browser/web_contents_user_data.h"
+#include "url/gurl.h"
+
+namespace signin {
+
+enum class ReauthResult;
+
+// Tab helper class observing navigations within the reauth flow and notifying
+// a caller about a flow result.
+class ReauthTabHelper : public content::WebContentsUserData<ReauthTabHelper>,
+                        public content::WebContentsObserver {
+ public:
+  using ReauthCallback = base::OnceCallback<void(signin::ReauthResult)>;
+
+  // Creates a new ReauthTabHelper and attaches it to |web_contents|. If an
+  // instance is already attached, no replacement happens, just notifies the
+  // caller by invoking |callback| with signin::ReauthResult::kCancelled.
+  // Initializes a helper with:
+  // - |callback| to be called when the reauth flow is complete.
+  // - |reauth_url| that should be the final destination of the reauth flow.
+  static void CreateForWebContents(content::WebContents* web_contents,
+                                   const GURL& reauth_url,
+                                   ReauthCallback callback);
+
+  ReauthTabHelper(const ReauthTabHelper&) = delete;
+  ReauthTabHelper& operator=(const ReauthTabHelper&) = delete;
+
+  ~ReauthTabHelper() override;
+
+  // If |callback_| is not null, calls |callback_| with |result|.
+  void CompleteReauth(signin::ReauthResult result);
+
+  // content::WebContentsObserver
+  void DidFinishNavigation(
+      content::NavigationHandle* navigation_handle) override;
+  void WebContentsDestroyed() override;
+
+  bool is_within_reauth_origin();
+  bool has_last_committed_error_page();
+
+ private:
+  friend class content::WebContentsUserData<ReauthTabHelper>;
+  explicit ReauthTabHelper(content::WebContents* web_contents,
+                           const GURL& reauth_url,
+                           ReauthCallback callback);
+
+  const GURL reauth_url_;
+  ReauthCallback callback_;
+  bool is_within_reauth_origin_ = true;
+  bool has_last_committed_error_page_ = false;
+
+  WEB_CONTENTS_USER_DATA_KEY_DECL();
+};
+
+}  // namespace signin
+
+#endif  // CHROME_BROWSER_SIGNIN_REAUTH_TAB_HELPER_H_