Split GCMDriver into platform-specific implementations

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 "components/gcm_driver/gcm_driver.h"
+
 namespace gcm {
 
-class GCMDriverAndroid {
+// GCMDriver implementation for Android.
+class GCMDriverAndroid : public GCMDriver {
  public:
-  // Register JNI methods
+  GCMDriverAndroid();
+  virtual ~GCMDriverAndroid();
+
+  // GCMDriver implementation:
+  virtual void Enable() OVERRIDE;
+  virtual void Disable() OVERRIDE;
+  virtual void Register(const std::string& app_id,
+                        const std::vector<std::string>& sender_ids,
+                        const RegisterCallback& callback) OVERRIDE;
+  virtual void Unregister(const std::string& app_id,
+                          const UnregisterCallback& callback) OVERRIDE;
+  virtual void Send(const std::string& app_id,
+                    const std::string& receiver_id,
+                    const GCMClient::OutgoingMessage& message,
+                    const SendCallback& callback) OVERRIDE;
+  virtual GCMClient* GetGCMClientForTesting() const OVERRIDE;
+  virtual bool IsStarted() const OVERRIDE;
+  virtual bool IsGCMClientReady() 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;
+
+  // Register JNI methods.
   static bool RegisterBindings(JNIEnv* env);
 };
 
 }  // namespace gcm
 
 #endif  // COMPONENTS_GCM_DRIVER_GCM_DRIVER_ANDROID_H