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

chrome/browser/extensions/api/preference/preference_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.
 
 #include "chrome/browser/extensions/api/preference/preference_api.h"
 
 #include <map>
 #include <utility>
 
 #include "base/lazy_instance.h"
 #include "base/memory/singleton.h"
 #include "base/prefs/pref_service.h"
 #include "base/stl_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/values.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/extensions/api/content_settings/content_settings_service.h"
 #include "chrome/browser/extensions/api/preference/preference_api_constants.h"
 #include "chrome/browser/extensions/api/preference/preference_helpers.h"
 #include "chrome/browser/extensions/api/proxy/proxy_api.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/pref_names.h"
 #include "components/translate/core/common/translate_pref_names.h"
 #include "content/public/browser/notification_details.h"
 #include "content/public/browser/notification_source.h"
 #include "extensions/browser/extension_pref_value_map.h"
 #include "extensions/browser/extension_pref_value_map_factory.h"
 #include "extensions/browser/extension_prefs_factory.h"
-#include "extensions/browser/extension_system.h"
 #include "extensions/browser/extension_system_provider.h"
 #include "extensions/browser/extensions_browser_client.h"
 #include "extensions/browser/pref_names.h"
 #include "extensions/common/error_utils.h"
 #include "extensions/common/permissions/api_permission.h"
 
 namespace keys = extensions::preference_api_constants;
 namespace helpers = extensions::preference_helpers;
 
 using base::DictionaryValue;
@@ skipping 365 matching lines @@
 }
 
 PreferenceAPI::PreferenceAPI(content::BrowserContext* context)
     : profile_(Profile::FromBrowserContext(context)) {
   for (size_t i = 0; i < arraysize(kPrefMapping); ++i) {
     std::string event_name;
     APIPermission::ID permission = APIPermission::kInvalid;
     bool rv = PrefMapping::GetInstance()->FindEventForBrowserPref(
         kPrefMapping[i].browser_pref, &event_name, &permission);
     DCHECK(rv);
-    ExtensionSystem::Get(profile_)->event_router()->RegisterObserver(
-        this, event_name);
+    EventRouter::Get(profile_)->RegisterObserver(this, event_name);
   }
   content_settings_store()->AddObserver(this);
 }
 
 PreferenceAPI::~PreferenceAPI() {
 }
 
 void PreferenceAPI::Shutdown() {
-  ExtensionSystem::Get(profile_)->event_router()->UnregisterObserver(this);
+  EventRouter::Get(profile_)->UnregisterObserver(this);
   if (!extension_prefs()->extensions_disabled())
     ClearIncognitoSessionOnlyContentSettings();
   content_settings_store()->RemoveObserver(this);
 }
 
 static base::LazyInstance<BrowserContextKeyedAPIFactory<PreferenceAPI> >
     g_factory = LAZY_INSTANCE_INITIALIZER;
 
 // static
 BrowserContextKeyedAPIFactory<PreferenceAPI>*
 PreferenceAPI::GetFactoryInstance() {
   return g_factory.Pointer();
 }
 
 // static
 PreferenceAPI* PreferenceAPI::Get(content::BrowserContext* context) {
   return BrowserContextKeyedAPIFactory<PreferenceAPI>::Get(context);
 }
 
 void PreferenceAPI::OnListenerAdded(const EventListenerInfo& details) {
   preference_event_router_.reset(new PreferenceEventRouter(profile_));
-  ExtensionSystem::Get(profile_)->event_router()->UnregisterObserver(this);
+  EventRouter::Get(profile_)->UnregisterObserver(this);
 }
 
 void PreferenceAPI::OnContentSettingChanged(const std::string& extension_id,
                                             bool incognito) {
   if (incognito) {
     extension_prefs()->UpdateExtensionPref(
         extension_id,
         pref_names::kPrefIncognitoContentSettings,
         content_settings_store()->GetSettingsForExtension(
             extension_id, kExtensionPrefsScopeIncognitoPersistent));
@@ skipping 248 matching lines @@
           pref_key, PreferenceFunction::PERMISSION_TYPE_WRITE, &browser_pref)) {
     return false;
   }
 
   PreferenceAPI::Get(GetProfile())
       ->RemoveExtensionControlledPref(extension_id(), browser_pref, scope);
   return true;
 }
 
 }  // namespace extensions