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

chrome/browser/apps/ephemeral_app_browsertest.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 "apps/saved_files_service.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/stl_util.h"
 #include "chrome/browser/apps/app_browsertest_util.h"
 #include "chrome/browser/apps/ephemeral_app_service.h"
 #include "chrome/browser/extensions/api/file_system/file_system_api.h"
@@ skipping 186 matching lines @@
 // Verify that ephemeral apps can be launched and receive system events when
 // they are running. Once they are inactive they should not receive system
 // events.
 IN_PROC_BROWSER_TEST_F(EphemeralAppBrowserTest, EventDispatchWhenLaunched) {
   const Extension* extension =
       InstallAndLaunchEphemeralApp(kDispatchEventTestApp);
   ASSERT_TRUE(extension);
 
   // Send a fake alarm event to the app and verify that a response is
   // received.
-  EventRouter* event_router =
-      ExtensionSystem::Get(browser()->profile())->event_router();
+  EventRouter* event_router = EventRouter::Get(browser()->profile());
   ASSERT_TRUE(event_router);
 
   ExtensionTestMessageListener alarm_received_listener("alarm_received", false);
   DispatchAlarmEvent(event_router, extension->id());
   ASSERT_TRUE(alarm_received_listener.WaitUntilSatisfied());
 
   CloseApp(extension->id());
 
   // The app needs to be launched once in order to have the onAlarm() event
   // registered.
@@ skipping 284 matching lines @@
 
   // The garbage collected app should no longer be in the preferences.
   extensions_info = prefs->GetEvictedEphemeralAppsInfo();
   EXPECT_TRUE(IsAppInExtensionsInfo(*extensions_info, retain_app_id));
   ASSERT_FALSE(IsAppInExtensionsInfo(*extensions_info, evict_app_id));
 
   // Reinstall the app and verify that all data has been reset.
   evict_app = InstallEphemeralApp(kRetainDataApp);
   ASSERT_TRUE(LaunchAppAndRunTest(evict_app, "DataReset")) << message_;
 }