Use EventHandler for IME

ash/host/ash_remote_window_tree_host_win.h

 // 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.
 
 #ifndef ASH_HOST_REMOTE_WINDOW_TREE_HOST_WIN_H_
 #define ASH_HOST_REMOTE_WINDOW_TREE_HOST_WIN_H_
 
 #include <windows.h>
 
 #include "ash/ash_export.h"
@@ skipping 20 matching lines @@
       scoped_ptr<RootWindowTransformer> transformer) override;
   gfx::Insets GetHostInsets() const override;
   aura::WindowTreeHost* AsWindowTreeHost() override;
 
   // WindowTreeHostWin:
   gfx::Transform GetRootTransform() const override;
   void SetRootTransform(const gfx::Transform& transform) override;
   gfx::Transform GetInverseRootTransform() const override;
   void UpdateRootWindowSize(const gfx::Size& host_size) override;
 
+  // ui::internal::InputMethodDelegate:
+  bool DispatchKeyEventPostIME(const ui::KeyEvent& event) override;
+
+  // ui::EventSource:
+  ui::EventDispatchDetails DeliverEventToProcessor(ui::Event* event) override;
+
   TransformerHelper transformer_helper_;
 
   DISALLOW_COPY_AND_ASSIGN(AshRemoteWindowTreeHostWin);
 };
 
 }  // namespace ash
 
 #endif  // ASH_HOST_REMOTE_WINDOW_TREE_HOST_WIN_H_