signin: force web signin flow initiated visits to accounts.google.com to their own process.

chrome/browser/ui/webui/sync_promo/sync_promo_ui.h

 // 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 CHROME_BROWSER_UI_WEBUI_SYNC_PROMO_SYNC_PROMO_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_SYNC_PROMO_SYNC_PROMO_UI_H_
 
 #include "content/public/browser/web_ui_controller.h"
 
 class Profile;
@@ skipping 61 matching lines @@
   static bool GetAutoCloseForSyncPromoURL(const GURL& url);
 
   // Returns true if chrome should use the web-based sign in flow, false if
   // chrome should use the ClientLogin flow.  This function will return true
   // only for platforms where |ENABLE_ONE_CLICK_SIGNIN| is defined.
   static bool UseWebBasedSigninFlow();
 
   // Forces UseWebBasedSigninFlow() to return true when set; used in tests only.
   static void ForceWebBasedSigninFlowForTesting(bool force);
 
+  static bool IsWebBasedSigninFlowURL(const GURL& url);
+
  private:
   DISALLOW_COPY_AND_ASSIGN(SyncPromoUI);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_SYNC_PROMO_SYNC_PROMO_UI_H_