Extract LazyBackgroundTaskQueue from ExtensionSystem.

chrome/browser/extensions/extension_system_impl.h

 // 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_SYSTEM_IMPL_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_SYSTEM_IMPL_H_
 
 #include "base/memory/scoped_vector.h"
 #include "extensions/browser/extension_system.h"
 #include "extensions/common/one_shot_event.h"
@@ skipping 24 matching lines @@
   void Shutdown() override;
 
   void InitForRegularProfile(bool extensions_enabled) override;
 
   ExtensionService* extension_service() override;  // shared
   RuntimeData* runtime_data() override;            // shared
   ManagementPolicy* management_policy() override;  // shared
   SharedUserScriptMaster* shared_user_script_master() override;  // shared
   StateStore* state_store() override;                              // shared
   StateStore* rules_store() override;                              // shared
-  LazyBackgroundTaskQueue* lazy_background_task_queue() override;  // shared
   InfoMap* info_map() override;                                    // shared
   EventRouter* event_router() override;                            // shared
   QuotaService* quota_service() override;  // shared
 
   void RegisterExtensionWithRequestContexts(
       const Extension* extension) override;
 
   void UnregisterExtensionWithRequestContexts(
       const std::string& extension_id,
       const UnloadedExtensionInfo::Reason reason) override;
@@ skipping 22 matching lines @@
     // KeyedService implementation.
     void Shutdown() override;
 
     StateStore* state_store();
     StateStore* rules_store();
     ExtensionService* extension_service();
     RuntimeData* runtime_data();
     ManagementPolicy* management_policy();
     SharedUserScriptMaster* shared_user_script_master();
     InfoMap* info_map();
-    LazyBackgroundTaskQueue* lazy_background_task_queue();
     EventRouter* event_router();
     QuotaService* quota_service();
     const OneShotEvent& ready() const { return ready_; }
     ContentVerifier* content_verifier();
 
    private:
     Profile* profile_;
 
     // The services that are shared between normal and incognito profiles.
 
     scoped_ptr<StateStore> state_store_;
     scoped_ptr<StateStoreNotificationObserver>
         state_store_notification_observer_;
     scoped_ptr<StateStore> rules_store_;
     // LazyBackgroundTaskQueue is a dependency of
     // MessageService and EventRouter.
-    scoped_ptr<LazyBackgroundTaskQueue> lazy_background_task_queue_;
     scoped_ptr<EventRouter> event_router_;
     scoped_ptr<NavigationObserver> navigation_observer_;
     // Shared memory region manager for scripts statically declared in extension
     // manifests. This region is shared between all extensions.
     scoped_ptr<SharedUserScriptMaster> shared_user_script_master_;
     scoped_ptr<RuntimeData> runtime_data_;
     // ExtensionService depends on StateStore, Blacklist and RuntimeData.
     scoped_ptr<ExtensionService> extension_service_;
     scoped_ptr<ManagementPolicy> management_policy_;
     // extension_info_map_ needs to outlive process_manager_.
@@ skipping 14 matching lines @@
   Profile* profile_;
 
   Shared* shared_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionSystemImpl);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_SYSTEM_IMPL_H_