Extract LazyBackgroundTaskQueue from ExtensionSystem.

extensions/browser/lazy_background_task_queue_factory.h

Index: extensions/browser/lazy_background_task_queue_factory.h
diff --git a/extensions/browser/declarative_user_script_manager_factory.h b/extensions/browser/lazy_background_task_queue_factory.h
similarity index 52%
copy from extensions/browser/declarative_user_script_manager_factory.h
copy to extensions/browser/lazy_background_task_queue_factory.h
index e5056afc7a08866452fa4c29409e1657e9150677..98917c91691f500ed39662afe0c028690f74ef35 100644
--- a/extensions/browser/declarative_user_script_manager_factory.h
+++ b/extensions/browser/lazy_background_task_queue_factory.h
@@ -2,28 +2,28 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef EXTENSIONS_BROWSER_DECLARATIVE_USER_SCRIPT_MANAGER_FACTORY_H_
-#define EXTENSIONS_BROWSER_DECLARATIVE_USER_SCRIPT_MANAGER_FACTORY_H_
+#ifndef EXTENSIONS_BROWSER_LAZY_BACKGROUND_TASK_QUEUE_FACTORY_H_
+#define EXTENSIONS_BROWSER_LAZY_BACKGROUND_TASK_QUEUE_FACTORY_H_
 
 #include "base/memory/singleton.h"
 #include "components/keyed_service/content/browser_context_keyed_service_factory.h"
 
 namespace extensions {
 
-class DeclarativeUserScriptManager;
+class LazyBackgroundTaskQueue;
 
-class DeclarativeUserScriptManagerFactory
+class LazyBackgroundTaskQueueFactory
     : public BrowserContextKeyedServiceFactory {
  public:
-  static DeclarativeUserScriptManager* GetForBrowserContext(
+  static LazyBackgroundTaskQueue* GetForBrowserContext(
       content::BrowserContext* context);
-  static DeclarativeUserScriptManagerFactory* GetInstance();
+  static LazyBackgroundTaskQueueFactory* GetInstance();
 
  private:
-  friend struct DefaultSingletonTraits<DeclarativeUserScriptManagerFactory>;
+  friend struct DefaultSingletonTraits<LazyBackgroundTaskQueueFactory>;
 
-  DeclarativeUserScriptManagerFactory();
-  ~DeclarativeUserScriptManagerFactory() override;
+  LazyBackgroundTaskQueueFactory();
+  ~LazyBackgroundTaskQueueFactory() override;
 
   // BrowserContextKeyedServiceFactory implementation
   KeyedService* BuildServiceInstanceFor(
@@ -31,9 +31,9 @@ class DeclarativeUserScriptManagerFactory
   content::BrowserContext* GetBrowserContextToUse(
       content::BrowserContext* context) const override;
 
-  DISALLOW_COPY_AND_ASSIGN(DeclarativeUserScriptManagerFactory);
+  DISALLOW_COPY_AND_ASSIGN(LazyBackgroundTaskQueueFactory);
 };
 
 }  // namespace extensions
 
-#endif  // EXTENSIONS_BROWSER_DECLARATIVE_USER_SCRIPT_MANAGER_FACTORY_H_
+#endif  // EXTENSIONS_BROWSER_LAZY_BACKGROUND_TASK_QUEUE_FACTORY_H_