cleanup: Use EventRouter instead of ExtensionSystem::Get->event_router()

chrome/browser/extensions/api/media_galleries/media_galleries_api.cc

 // Copyright (c) 2012 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.
 
 // Implements the Chrome Extensions Media Galleries API.
 
 #include "chrome/browser/extensions/api/media_galleries/media_galleries_api.h"
 
 #include <set>
 #include <string>
@@ skipping 284 matching lines @@
 MediaGalleriesEventRouter* MediaGalleriesEventRouter::Get(
     content::BrowserContext* context) {
   DCHECK(media_file_system_registry()
              ->GetPreferences(Profile::FromBrowserContext(context))
              ->IsInitialized());
   return BrowserContextKeyedAPIFactory<MediaGalleriesEventRouter>::Get(context);
 }
 
 bool MediaGalleriesEventRouter::ExtensionHasScanProgressListener(
     const std::string& extension_id) const {
-  EventRouter* router = ExtensionSystem::Get(profile_)->event_router();
-  return router->ExtensionHasEventListener(
-      extension_id,
-      MediaGalleries::OnScanProgress::kEventName);
+  return EventRouter::Get(profile_)->ExtensionHasEventListener(
+      extension_id, MediaGalleries::OnScanProgress::kEventName);
 }
 
 void MediaGalleriesEventRouter::OnScanStarted(const std::string& extension_id) {
   MediaGalleries::ScanProgressDetails details;
   details.type = MediaGalleries::SCAN_PROGRESS_TYPE_START;
   DispatchEventToExtension(
       extension_id,
       MediaGalleries::OnScanProgress::kEventName,
       MediaGalleries::OnScanProgress::Create(details).Pass());
 }
@@ skipping 32 matching lines @@
       extension_id,
       MediaGalleries::OnScanProgress::kEventName,
       MediaGalleries::OnScanProgress::Create(details).Pass());
 }
 
 void MediaGalleriesEventRouter::DispatchEventToExtension(
     const std::string& extension_id,
     const std::string& event_name,
     scoped_ptr<base::ListValue> event_args) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
-  EventRouter* router =
-      extensions::ExtensionSystem::Get(profile_)->event_router();
+  EventRouter* router = EventRouter::Get(profile_);
   if (!router->ExtensionHasEventListener(extension_id, event_name))
     return;
 
   scoped_ptr<extensions::Event> event(
       new extensions::Event(event_name, event_args.Pass()));
   router->DispatchEventToExtension(extension_id, event.Pass());
 }
 
 MediaGalleriesGetMediaFileSystemsFunction::
     ~MediaGalleriesGetMediaFileSystemsFunction() {}
@@ skipping 509 matching lines @@
   if (!parse_success) {
     SendResponse(false);
     return;
   }
 
   SetResult(metadata_dictionary->DeepCopy());
   SendResponse(true);
 }
 
 }  // namespace extensions