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

chrome/browser/extensions/api/hotword_private/hotword_private_api.cc

 // Copyright 2014 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/hotword_private/hotword_private_api.h"
 
 #include "base/lazy_instance.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/search/hotword_service.h"
 #include "chrome/browser/search/hotword_service_factory.h"
 #include "chrome/common/pref_names.h"
 #include "extensions/browser/event_router.h"
-#include "extensions/browser/extension_system.h"
 
 namespace extensions {
 
 namespace OnEnabledChanged =
     api::hotword_private::OnEnabledChanged;
 
 static base::LazyInstance<
     BrowserContextKeyedAPIFactory<HotwordPrivateEventService> > g_factory =
     LAZY_INSTANCE_INITIALIZER;
 
@@ skipping 26 matching lines @@
 
 void HotwordPrivateEventService::OnEnabledChanged(
     const std::string& pref_name) {
   DCHECK_EQ(pref_name, std::string(prefs::kHotwordSearchEnabled));
   SignalEvent();
 }
 
 void HotwordPrivateEventService::SignalEvent() {
   using OnEnabledChanged::kEventName;
 
-  EventRouter* router = ExtensionSystem::Get(profile_)->event_router();
+  EventRouter* router = EventRouter::Get(profile_);
   if (!router || !router->HasEventListener(kEventName))
     return;
   scoped_ptr<base::ListValue> args(new base::ListValue());
   scoped_ptr<Event> event(new Event(kEventName, args.Pass()));
   router->BroadcastEvent(event.Pass());
 }
 
 bool HotwordPrivateSetEnabledFunction::RunImpl() {
   scoped_ptr<api::hotword_private::SetEnabled::Params> params(
       api::hotword_private::SetEnabled::Params::Create(*args_));
@@ skipping 29 matching lines @@
   result.enabled = prefs->GetBoolean(prefs::kHotwordSearchEnabled);
   result.audio_logging_enabled = false;
   if (hotword_service)
     result.audio_logging_enabled = hotword_service->IsOptedIntoAudioLogging();
 
   SetResult(result.ToValue().release());
   return true;
 }
 
 }  // namespace extensions