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

chrome/browser/extensions/api/braille_display_private/braille_display_private_api.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 "chrome/browser/extensions/api/braille_display_private/braille_display_private_api.h"
 
 #include "base/lazy_instance.h"
 #include "chrome/browser/extensions/api/braille_display_private/braille_controller.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_manager.h"
-#include "extensions/browser/extension_system.h"
 
 #if defined(OS_CHROMEOS)
 #include "chrome/browser/chromeos/login/screen_locker.h"
 #include "chrome/browser/chromeos/profiles/profile_helper.h"
 #endif
 
 namespace OnDisplayStateChanged =
     extensions::api::braille_display_private::OnDisplayStateChanged;
 namespace OnKeyEvent = extensions::api::braille_display_private::OnKeyEvent;
 namespace WriteDots = extensions::api::braille_display_private::WriteDots;
@@ skipping 93 matching lines @@
   BrailleController* braille_controller = BrailleController::GetInstance();
   if (!event_delegate_->HasListener() &&
       scoped_observer_.IsObserving(braille_controller)) {
     scoped_observer_.Remove(braille_controller);
   }
 }
 
 BrailleDisplayPrivateAPI::DefaultEventDelegate::DefaultEventDelegate(
     EventRouter::Observer* observer, Profile* profile)
     : observer_(observer), profile_(profile) {
-  EventRouter* event_router = ExtensionSystem::Get(profile_)->event_router();
+  EventRouter* event_router = EventRouter::Get(profile_);
   event_router->RegisterObserver(observer_, OnDisplayStateChanged::kEventName);
   event_router->RegisterObserver(observer_, OnKeyEvent::kEventName);
 }
 
 BrailleDisplayPrivateAPI::DefaultEventDelegate::~DefaultEventDelegate() {
-  ExtensionSystem::Get(profile_)->event_router()->UnregisterObserver(observer_);
+  EventRouter::Get(profile_)->UnregisterObserver(observer_);
 }
 
 void BrailleDisplayPrivateAPI::DefaultEventDelegate::BroadcastEvent(
     scoped_ptr<Event> event) {
-  ExtensionSystem::Get(profile_)->event_router()->BroadcastEvent(event.Pass());
+  EventRouter::Get(profile_)->BroadcastEvent(event.Pass());
 }
 
 bool BrailleDisplayPrivateAPI::DefaultEventDelegate::HasListener() {
-  EventRouter* event_router = ExtensionSystem::Get(profile_)->event_router();
+  EventRouter* event_router = EventRouter::Get(profile_);
   return (event_router->HasEventListener(OnDisplayStateChanged::kEventName) ||
           event_router->HasEventListener(OnKeyEvent::kEventName));
 }
 
 namespace api {
 bool BrailleDisplayPrivateGetDisplayStateFunction::Prepare() {
   return true;
 }
 
 void BrailleDisplayPrivateGetDisplayStateFunction::Work() {
@@ skipping 21 matching lines @@
 
 void BrailleDisplayPrivateWriteDotsFunction::Work() {
   BrailleController::GetInstance()->WriteDots(params_->cells);
 }
 
 bool BrailleDisplayPrivateWriteDotsFunction::Respond() {
   return true;
 }
 }  // namespace api
 }  // namespace extensions