[GCM] Add app handler support for connection events

components/gcm_driver/gcm_driver_android.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_ANDROID_H
 #define COMPONENTS_GCM_DRIVER_GCM_DRIVER_ANDROID_H
 
 #include <jni.h>
 
 #include "base/android/scoped_java_ref.h"
@@ skipping 31 matching lines @@
 
   // Register JNI methods.
   static bool RegisterBindings(JNIEnv* env);
 
   // GCMDriver implementation:
   virtual void Enable() OVERRIDE;
   virtual void Disable() OVERRIDE;
   virtual GCMClient* GetGCMClientForTesting() const OVERRIDE;
   virtual bool IsStarted() const OVERRIDE;
   virtual bool IsGCMClientReady() const OVERRIDE;
+  virtual bool IsConnected() const OVERRIDE;
   virtual void GetGCMStatistics(const GetGCMStatisticsCallback& callback,
                                 bool clear_logs) OVERRIDE;
   virtual void SetGCMRecording(const GetGCMStatisticsCallback& callback,
                                bool recording) OVERRIDE;
   virtual std::string SignedInUserName() const OVERRIDE;
 
  protected:
   // GCMDriver implementation:
   virtual GCMClient::Result EnsureStarted() OVERRIDE;
   virtual void RegisterImpl(
       const std::string& app_id,
       const std::vector<std::string>& sender_ids) OVERRIDE;
   virtual void UnregisterImpl(const std::string& app_id) OVERRIDE;
   virtual void SendImpl(const std::string& app_id,
                         const std::string& receiver_id,
                         const GCMClient::OutgoingMessage& message) OVERRIDE;
 
  private:
   base::android::ScopedJavaGlobalRef<jobject> java_ref_;
 
   DISALLOW_COPY_AND_ASSIGN(GCMDriverAndroid);
 };
 
 }  // namespace gcm
 
 #endif  // COMPONENTS_GCM_DRIVER_GCM_DRIVER_ANDROID_H