Do not create GCM store if it is not needed

google_apis/gcm/engine/gcm_store.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 "google_apis/gcm/engine/gcm_store.h"
 
 namespace gcm {
 
 GCMStore::LoadResult::LoadResult()
     : success(false),
+      store_does_not_exist(false),
       device_android_id(0),
       device_security_token(0) {
 }
 
 GCMStore::LoadResult::~LoadResult() {}
 
 void GCMStore::LoadResult::Reset() {
   device_android_id = 0;
   device_security_token = 0;
   registrations.clear();
   incoming_messages.clear();
   outgoing_messages.clear();
   gservices_settings.clear();
   gservices_digest.clear();
   last_checkin_time = base::Time::FromInternalValue(0LL);
   last_token_fetch_time = base::Time::FromInternalValue(0LL);
   last_checkin_accounts.clear();
   account_mappings.clear();
   heartbeat_intervals.clear();
   success = false;
+  store_does_not_exist = false;
   instance_id_data.clear();
 }
 
 GCMStore::GCMStore() {}
 
 GCMStore::~GCMStore() {}
 
 }  // namespace gcm