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

components/gcm_driver/gcm_client_impl.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_client_impl.h"
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 598 matching lines @@
   delegate_->OnDisconnected();
   mcs_client_.reset();
   checkin_request_.reset();
   // Delete all of the pending registration and unregistration requests.
   STLDeleteValues(&pending_registration_requests_);
   STLDeleteValues(&pending_unregistration_requests_);
   state_ = INITIALIZED;
   gcm_store_->Close();
 }
 
-void GCMClientImpl::CheckOut() {
-  Stop();
-  gcm_store_->Destroy(base::Bind(&GCMClientImpl::OnGCMStoreDestroyed,
-                                 weak_ptr_factory_.GetWeakPtr()));
-}
-
 void GCMClientImpl::Register(const std::string& app_id,
                              const std::vector<std::string>& sender_ids) {
   DCHECK_EQ(state_, READY);
 
   // If the same sender ids is provided, return the cached registration ID
   // directly.
   RegistrationInfoMap::const_iterator registrations_iter =
       registrations_.find(app_id);
   if (registrations_iter != registrations_.end() &&
       registrations_iter->second->sender_ids == sender_ids) {
@@ skipping 351 matching lines @@
 
   recorder_.RecordIncomingSendError(
       data_message_stanza.category(),
       data_message_stanza.to(),
       data_message_stanza.id());
   delegate_->OnMessageSendError(data_message_stanza.category(),
                                 send_error_details);
 }
 
 }  // namespace gcm