[GCM] API update to allow only a single sender in registration

chrome/browser/services/gcm/gcm_client_mock.h

 // 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.
 
 #ifndef CHROME_BROWSER_SERVICES_GCM_GCM_CLIENT_MOCK_H_
 #define CHROME_BROWSER_SERVICES_GCM_GCM_CLIENT_MOCK_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/weak_ptr.h"
 #include "google_apis/gcm/gcm_client.h"
@@ skipping 30 matching lines @@
       const base::FilePath& store_path,
       const std::vector<std::string>& account_ids,
       const scoped_refptr<base::SequencedTaskRunner>& blocking_task_runner,
       const scoped_refptr<net::URLRequestContextGetter>&
           url_request_context_getter,
       Delegate* delegate) OVERRIDE;
   virtual void Load() OVERRIDE;
   virtual void CheckOut() OVERRIDE;
   virtual void Register(const std::string& app_id,
                         const std::string& cert,
-                        const std::vector<std::string>& sender_ids) OVERRIDE;
+                        const std::string& sender_id) OVERRIDE;
   virtual void Unregister(const std::string& app_id) OVERRIDE;
   virtual void Send(const std::string& app_id,
                     const std::string& receiver_id,
                     const OutgoingMessage& message) OVERRIDE;
 
   // Initiate the loading that has been delayed.
   // Called on UI thread.
   void PerformDelayedLoading();
 
   // Simulate receiving something from the server.
   // Called on UI thread.
   void ReceiveMessage(const std::string& app_id,
                       const IncomingMessage& message);
   void DeleteMessages(const std::string& app_id);
 
-  static std::string GetRegistrationIdFromSenderIds(
-      const std::vector<std::string>& sender_ids);
+  static std::string GetRegistrationIdFromSenderId(
+      const std::string& sender_id);
 
   Status status() const { return status_; }
 
  private:
   // Called on IO thread.
   void DoLoading();
   void CheckinFinished();
   void RegisterFinished(const std::string& app_id,
                         const std::string& registrion_id);
   void SendFinished(const std::string& app_id, const std::string& message_id);
   void MessageReceived(const std::string& app_id,
                        const IncomingMessage& message);
   void MessagesDeleted(const std::string& app_id);
   void MessageSendError(const std::string& app_id,
                         const std::string& message_id);
 
   Delegate* delegate_;
   Status status_;
   LoadingDelay loading_delay_;
   ErrorSimulation error_simulation_;
   base::WeakPtrFactory<GCMClientMock> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GCMClientMock);
 };
 
 }  // namespace gcm
 
 #endif  // CHROME_BROWSER_SERVICES_GCM_GCM_CLIENT_MOCK_H_