[Signin] Factor out a helper class to load a continue URL once Sync is configured.

chrome/browser/sync/test_profile_sync_service.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_SYNC_TEST_PROFILE_SYNC_SERVICE_H_
 #define CHROME_BROWSER_SYNC_TEST_PROFILE_SYNC_SERVICE_H_
 
 #include <string>
 
 #include "base/callback.h"
@@ skipping 74 matching lines @@
   // We implement our own version to avoid some DCHECKs.
   virtual syncer::UserShare* GetUserShare() const OVERRIDE;
 
   static TestProfileSyncService* BuildAutoStartAsyncInit(
       Profile* profile, base::Closure callback);
 
   ProfileSyncComponentsFactoryMock* components_factory_mock();
 
   syncer::TestIdFactory* id_factory();
 
+  // Raise visibility to ease testing.
+  using ProfileSyncService::NotifyObservers;
+
  protected:
   static KeyedService* TestFactoryFunction(content::BrowserContext* profile);
 
   // Return NULL handle to use in backend initialization to avoid receiving
   // js messages on UI loop when it's being destroyed, which are not deleted
   // and cause memory leak in test.
   virtual syncer::WeakHandle<syncer::JsEventHandler> GetJsEventHandler()
       OVERRIDE;
 
  private:
   syncer::TestIdFactory id_factory_;
 };
 
 #endif  // CHROME_BROWSER_SYNC_TEST_PROFILE_SYNC_SERVICE_H_