Extract LazyBackgroundTaskQueue from ExtensionSystem.

chrome/browser/extensions/extension_system_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 "chrome/browser/extensions/extension_system_impl.h"
 
 #include "base/base_switches.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
@@ skipping 81 matching lines @@
 //
 
 ExtensionSystemImpl::Shared::Shared(Profile* profile)
     : profile_(profile) {
 }
 
 ExtensionSystemImpl::Shared::~Shared() {
 }
 
 void ExtensionSystemImpl::Shared::InitPrefs() {
-  lazy_background_task_queue_.reset(new LazyBackgroundTaskQueue(profile_));
   event_router_.reset(new EventRouter(profile_, ExtensionPrefs::Get(profile_)));
   // Two state stores. The latter, which contains declarative rules, must be
   // loaded immediately so that the rules are ready before we issue network
   // requests.
   state_store_.reset(new StateStore(
       profile_,
       profile_->GetPath().AppendASCII(extensions::kStateStoreName),
       true));
   state_store_notification_observer_.reset(
       new StateStoreNotificationObserver(state_store_.get()));
@@ skipping 311 matching lines @@
 ExtensionSystemImpl::Shared::shared_user_script_master() {
   return shared_user_script_master_.get();
 }
 
 InfoMap* ExtensionSystemImpl::Shared::info_map() {
   if (!extension_info_map_.get())
     extension_info_map_ = new InfoMap();
   return extension_info_map_.get();
 }
 
-LazyBackgroundTaskQueue*
-    ExtensionSystemImpl::Shared::lazy_background_task_queue() {
-  return lazy_background_task_queue_.get();
-}
-
 EventRouter* ExtensionSystemImpl::Shared::event_router() {
   return event_router_.get();
 }
 
 QuotaService* ExtensionSystemImpl::Shared::quota_service() {
   return quota_service_.get();
 }
 
 ContentVerifier* ExtensionSystemImpl::Shared::content_verifier() {
   return content_verifier_.get();
@@ skipping 48 matching lines @@
 StateStore* ExtensionSystemImpl::state_store() {
   return shared_->state_store();
 }
 
 StateStore* ExtensionSystemImpl::rules_store() {
   return shared_->rules_store();
 }
 
 InfoMap* ExtensionSystemImpl::info_map() { return shared_->info_map(); }
 
-LazyBackgroundTaskQueue* ExtensionSystemImpl::lazy_background_task_queue() {
-  return shared_->lazy_background_task_queue();
-}
-
 EventRouter* ExtensionSystemImpl::event_router() {
   return shared_->event_router();
 }
 
 const OneShotEvent& ExtensionSystemImpl::ready() const {
   return shared_->ready();
 }
 
 QuotaService* ExtensionSystemImpl::quota_service() {
   return shared_->quota_service();
@@ skipping 40 matching lines @@
 void ExtensionSystemImpl::UnregisterExtensionWithRequestContexts(
     const std::string& extension_id,
     const UnloadedExtensionInfo::Reason reason) {
   BrowserThread::PostTask(
       BrowserThread::IO,
       FROM_HERE,
       base::Bind(&InfoMap::RemoveExtension, info_map(), extension_id, reason));
 }
 
 }  // namespace extensions