Extract LazyBackgroundTaskQueue from ExtensionSystem.

extensions/browser/lazy_background_task_queue.cc

 // Copyright 2013 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 "extensions/browser/lazy_background_task_queue.h"
 
 #include "base/callback.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/site_instance.h"
 #include "content/public/browser/web_contents.h"
 #include "extensions/browser/extension_host.h"
 #include "extensions/browser/extension_registry.h"
 #include "extensions/browser/extensions_browser_client.h"
+#include "extensions/browser/lazy_background_task_queue_factory.h"
 #include "extensions/browser/notification_types.h"
 #include "extensions/browser/process_manager.h"
 #include "extensions/browser/process_map.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/manifest_handlers/background_info.h"
 #include "extensions/common/view_type.h"
 
 namespace extensions {
 
 LazyBackgroundTaskQueue::LazyBackgroundTaskQueue(
     content::BrowserContext* browser_context)
     : browser_context_(browser_context), extension_registry_observer_(this) {
   registrar_.Add(this,
                  extensions::NOTIFICATION_EXTENSION_HOST_DID_STOP_FIRST_LOAD,
                  content::NotificationService::AllBrowserContextsAndSources());
   registrar_.Add(this,
                  extensions::NOTIFICATION_EXTENSION_HOST_DESTROYED,
                  content::NotificationService::AllBrowserContextsAndSources());
 
   extension_registry_observer_.Add(ExtensionRegistry::Get(browser_context));
 }
 
 LazyBackgroundTaskQueue::~LazyBackgroundTaskQueue() {
 }
 
+// static
+LazyBackgroundTaskQueue* LazyBackgroundTaskQueue::Get(
+    content::BrowserContext* browser_context) {
+  return LazyBackgroundTaskQueueFactory::GetForBrowserContext(browser_context);
+}
+
 bool LazyBackgroundTaskQueue::ShouldEnqueueTask(
     content::BrowserContext* browser_context,
     const Extension* extension) {
   // Note: browser_context may not be the same as browser_context_ for incognito
   // extension tasks.
   DCHECK(extension);
   if (BackgroundInfo::HasBackgroundPage(extension)) {
     ProcessManager* pm = ProcessManager::Get(browser_context);
     ExtensionHost* background_host =
         pm->GetBackgroundHostForExtension(extension->id());
@@ skipping 125 matching lines @@
   // task queue as well.
   ExtensionsBrowserClient* browser_client = ExtensionsBrowserClient::Get();
   if (browser_client->HasOffTheRecordContext(browser_context)) {
     ProcessPendingTasks(NULL,
                         browser_client->GetOffTheRecordContext(browser_context),
                         extension);
   }
 }
 
 }  // namespace extensions