Split ExtensionSystem interface from ExtensionSystemImpl implementation, part 1.

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 "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/extensions/extension_host.h"
-#include "chrome/browser/extensions/extension_system.h"
 #include "chrome/common/extensions/extension_messages.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_registry.h"
+#include "extensions/browser/extension_system.h"
 #include "extensions/browser/extensions_browser_client.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) {
   registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_HOST_DID_STOP_LOADING,
                  content::NotificationService::AllBrowserContextsAndSources());
   registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_HOST_DESTROYED,
                  content::NotificationService::AllBrowserContextsAndSources());
   registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_UNLOADED,
                  content::Source<content::BrowserContext>(browser_context));
 }
 
 LazyBackgroundTaskQueue::~LazyBackgroundTaskQueue() {
 }
 
 bool LazyBackgroundTaskQueue::ShouldEnqueueTask(
     content::BrowserContext* browser_context,
     const Extension* extension) {
   DCHECK(extension);
   if (BackgroundInfo::HasBackgroundPage(extension)) {
-    ProcessManager* pm = ExtensionSystem::GetForBrowserContext(
+    ProcessManager* pm = ExtensionSystem::Get(
         browser_context)->process_manager();
     DCHECK(pm);
     ExtensionHost* background_host =
         pm->GetBackgroundHostForExtension(extension->id());
     if (!background_host || !background_host->did_stop_loading())
       return true;
     if (pm->IsBackgroundHostClosing(extension->id()))
       pm->CancelSuspend(extension);
   }
 
@@ skipping 14 matching lines @@
   if (it == pending_tasks_.end()) {
     tasks_list = new PendingTasksList();
     pending_tasks_[key] = linked_ptr<PendingTasksList>(tasks_list);
 
     const Extension* extension =
         ExtensionRegistry::Get(browser_context)->enabled_extensions().GetByID(
             extension_id);
     if (extension && BackgroundInfo::HasLazyBackgroundPage(extension)) {
       // If this is the first enqueued task, and we're not waiting for the
       // background page to unload, ensure the background page is loaded.
-      ProcessManager* pm = ExtensionSystem::GetForBrowserContext(
+      ProcessManager* pm = ExtensionSystem::Get(
           browser_context)->process_manager();
       pm->IncrementLazyKeepaliveCount(extension);
       // Creating the background host may fail, e.g. if |profile| is incognito
       // but the extension isn't enabled in incognito mode.
       if (!pm->CreateBackgroundHost(
             extension, BackgroundInfo::GetBackgroundURL(extension))) {
         task.Run(NULL);
         return;
       }
     }
@@ skipping 27 matching lines @@
   for (PendingTasksList::const_iterator it = tasks.begin();
        it != tasks.end(); ++it) {
     it->Run(host);
   }
 
   pending_tasks_.erase(key);
 
   // Balance the keepalive in AddPendingTask. Note we don't do this on a
   // failure to load, because the keepalive count is reset in that case.
   if (host && BackgroundInfo::HasLazyBackgroundPage(extension)) {
-    ExtensionSystem::GetForBrowserContext(browser_context)->process_manager()->
+    ExtensionSystem::Get(browser_context)->process_manager()->
         DecrementLazyKeepaliveCount(extension);
   }
 }
 
 void LazyBackgroundTaskQueue::Observe(
     int type,
     const content::NotificationSource& source,
     const content::NotificationDetails& details) {
   switch (type) {
     case chrome::NOTIFICATION_EXTENSION_HOST_DID_STOP_LOADING: {
@@ skipping 39 matching lines @@
       }
       break;
     }
     default:
       NOTREACHED();
       break;
   }
 }
 
 }  // namespace extensions