Push API: Fix unsubscribing from GCM on Android

components/gcm_driver/fake_gcm_driver.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/fake_gcm_driver.h"
 
 namespace gcm {
 
 FakeGCMDriver::FakeGCMDriver() {
 }
@@ skipping 51 matching lines @@
 
 GCMClient::Result FakeGCMDriver::EnsureStarted(
     GCMClient::StartMode start_mode) {
   return GCMClient::SUCCESS;
 }
 
 void FakeGCMDriver::RegisterImpl(const std::string& app_id,
                                  const std::vector<std::string>& sender_ids) {
 }
 
-void FakeGCMDriver::UnregisterImpl(const std::string& app_id) {
+void FakeGCMDriver::UnregisterImpl(const std::string& app_id,
+                                   const std::string* maybe_sender_id) {
 }
 
 void FakeGCMDriver::SendImpl(const std::string& app_id,
                              const std::string& receiver_id,
                              const GCMClient::OutgoingMessage& message) {
 }
 
 void FakeGCMDriver::SetAccountTokens(
     const std::vector<GCMClient::AccountTokenInfo>& account_tokens) {
 }
 
 void FakeGCMDriver::UpdateAccountMapping(
     const AccountMapping& account_mapping) {
 }
 
 void FakeGCMDriver::RemoveAccountMapping(const std::string& account_id) {
 }
 
 base::Time FakeGCMDriver::GetLastTokenFetchTime() {
   return base::Time();
 }
 
 void FakeGCMDriver::SetLastTokenFetchTime(const base::Time& time) {
 }
 
 void FakeGCMDriver::WakeFromSuspendForHeartbeat(bool wake) {
 }
 
 }  // namespace gcm