Do not use ash in chromeos::EventRewriter.

chrome/browser/chromeos/chrome_browser_main_chromeos.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/chromeos/chrome_browser_main_chromeos.h"
 
 #include <stddef.h>
 
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "ash/shell.h"
+#include "ash/sticky_keys/sticky_keys_controller.h"
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/files/file_util.h"
 #include "base/lazy_instance.h"
 #include "base/linux_util.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/path_service.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 933 matching lines @@
 
   ChromeBrowserMainPartsLinux::PostDestroyThreads();
 
   // Destroy DeviceSettingsService after g_browser_process.
   DeviceSettingsService::Shutdown();
 
   chromeos::ShutdownCloseTracking();
 }
 
 }  //  namespace chromeos