[GCM] Extracting GCMConnectionObserver from GCMAppHandler

components/gcm_driver/gcm_driver_android.cc

 // 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.
 
 #include "components/gcm_driver/gcm_driver_android.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_array.h"
 #include "base/android/jni_string.h"
 #include "base/compiler_specific.h"
@@ skipping 80 matching lines @@
 bool GCMDriverAndroid::RegisterBindings(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 void GCMDriverAndroid::OnSignedIn() {
 }
 
 void GCMDriverAndroid::Purge() {
 }
 
+void GCMDriverAndroid::AddConnectionObserver(GCMConnectionObserver* observer) {
+}
+
+void GCMDriverAndroid::RemoveConnectionObserver(
+    GCMConnectionObserver* observer) {
+}
+
 void GCMDriverAndroid::Enable() {
 }
 
 void GCMDriverAndroid::Disable() {
 }
 
 GCMClient* GCMDriverAndroid::GetGCMClientForTesting() const {
   NOTIMPLEMENTED();
   return NULL;
 }
@@ skipping 47 matching lines @@
       ConvertUTF8ToJavaString(env, app_id).Release());
 }
 
 void GCMDriverAndroid::SendImpl(const std::string& app_id,
                                 const std::string& receiver_id,
                                 const GCMClient::OutgoingMessage& message) {
   NOTIMPLEMENTED();
 }
 
 }  // namespace gcm