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

chrome/browser/extensions/api/location/location_manager.cc

 // Copyright (c) 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 "chrome/browser/extensions/api/location/location_manager.h"
 
 #include <math.h>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 375 matching lines @@
     event_name = location::OnLocationUpdate::kEventName;
   } else {
     // Set data for onLocationError event.
     // TODO(vadimt): Set name.
     args->AppendString(position.error_message);
     event_name = location::OnLocationError::kEventName;
   }
 
   scoped_ptr<Event> event(new Event(event_name, args.Pass()));
 
-  ExtensionSystem::Get(profile_)->event_router()->
-      DispatchEventToExtension(extension_id, event.Pass());
+  EventRouter::Get(profile_)
+      ->DispatchEventToExtension(extension_id, event.Pass());
 }
 
 void LocationManager::Observe(int type,
                               const content::NotificationSource& source,
                               const content::NotificationDetails& details) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
   switch (type) {
     case chrome::NOTIFICATION_EXTENSION_LOADED: {
       // Grants permission to use geolocation once an extension with "location"
@@ skipping 30 matching lines @@
 LocationManager::GetFactoryInstance() {
   return g_factory.Pointer();
 }
 
  // static
 LocationManager* LocationManager::Get(content::BrowserContext* context) {
   return BrowserContextKeyedAPIFactory<LocationManager>::Get(context);
 }
 
 }  // namespace extensions