[GCM] Remove GCMDriver::Purge and GCMClient::CheckOut

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 10 matching lines @@
 
 void FakeGCMDriver::RemoveAppHandler(const std::string& app_id) {
 }
 
 void FakeGCMDriver::OnSignedIn() {
 }
 
 void FakeGCMDriver::OnSignedOut() {
 }
 
-void FakeGCMDriver::Purge() {
-}
-
 void FakeGCMDriver::AddConnectionObserver(GCMConnectionObserver* observer) {
 }
 
 void FakeGCMDriver::RemoveConnectionObserver(GCMConnectionObserver* observer) {
 }
 
 void FakeGCMDriver::Enable() {
 }
 
 void FakeGCMDriver::Disable() {
@@ skipping 50 matching lines @@
   return base::Time();
 }
 
 void FakeGCMDriver::SetLastTokenFetchTime(const base::Time& time) {
 }
 
 void FakeGCMDriver::WakeFromSuspendForHeartbeat(bool wake) {
 }
 
 }  // namespace gcm