Push API: register PushMessagingServiceImpl as GCMAppHandler.

components/gcm_driver/gcm_driver.h

 // Copyright 2014 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 COMPONENTS_GCM_DRIVER_GCM_DRIVER_H_
 #define COMPONENTS_GCM_DRIVER_GCM_DRIVER_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 55 matching lines @@
   // This method must be called before destroying the GCMDriver. Once it has
   // been called, no other GCMDriver methods may be used.
   virtual void Shutdown();
 
   // Adds a handler for a given app.
   virtual void AddAppHandler(const std::string& app_id, GCMAppHandler* handler);
 
   // Remove the handler for a given app.
   virtual void RemoveAppHandler(const std::string& app_id);
 
+  // Returns the handler for the given app.
+  GCMAppHandler* GetAppHandler(const std::string& app_id);
+
   // Enables/disables GCM service.
   virtual void Enable() = 0;
   virtual void Disable() = 0;
 
   // For testing purpose. Always NULL on Android.
   virtual GCMClient* GetGCMClientForTesting() const = 0;
 
   // Returns true if the service was started.
   virtual bool IsStarted() const = 0;
 
@@ skipping 43 matching lines @@
 
   // Runs the Send callback.
   void SendFinished(const std::string& app_id,
                     const std::string& message_id,
                     GCMClient::Result result);
 
   bool HasRegisterCallback(const std::string& app_id);
 
   void ClearCallbacks();
 
-  // Returns the handler for the given app.
-  GCMAppHandler* GetAppHandler(const std::string& app_id);
-
  private:
   // Should be called when an app with |app_id| is trying to un/register.
   // Checks whether another un/registration is in progress.
   bool IsAsyncOperationPending(const std::string& app_id) const;
 
   // Callback map (from app_id to callback) for Register.
   std::map<std::string, RegisterCallback> register_callbacks_;
 
   // Callback map (from app_id to callback) for Unregister.
   std::map<std::string, UnregisterCallback> unregister_callbacks_;
 
   // Callback map (from <app_id, message_id> to callback) for Send.
   std::map<std::pair<std::string, std::string>, SendCallback> send_callbacks_;
 
   // App handler map (from app_id to handler pointer).
   // The handler is not owned.
   GCMAppHandlerMap app_handlers_;
 
   // The default handler when no app handler can be found in the map.
   DefaultGCMAppHandler default_app_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(GCMDriver);
 };
 
 }  // namespace gcm
 
 #endif  // COMPONENTS_GCM_DRIVER_GCM_DRIVER_H_