Use EventHandler for IME

ash/test/ash_test_base.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 "ash/test/ash_test_base.h"
 
 #include <string>
 #include <vector>
 
 #include "ash/ash_switches.h"
 #include "ash/display/display_controller.h"
+#include "ash/ime/input_method_event_handler.h"
 #include "ash/shell.h"
 #include "ash/shell/toplevel_window.h"
 #include "ash/test/ash_test_helper.h"
 #include "ash/test/display_manager_test_api.h"
 #include "ash/test/test_session_state_delegate.h"
 #include "ash/test/test_shell_delegate.h"
 #include "ash/test/test_system_tray_delegate.h"
 #include "ash/wm/window_positioner.h"
 #include "base/command_line.h"
 #include "ui/aura/client/aura_constants.h"
@@ skipping 331 matching lines @@
       break;
   }
 }
 
 void AshTestBase::UnblockUserSession() {
   Shell::GetInstance()->session_state_delegate()->UnlockScreen();
   SetSessionStarted(true);
   SetUserAddingScreenRunning(false);
 }
 
+void AshTestBase::DisableIME() {
+  Shell::GetInstance()->RemovePreTargetHandler(
+      Shell::GetInstance()->display_controller()->input_method_event_handler());
+}
 
 }  // namespace test
 }  // namespace ash