aura: Fix IME interaction in content-shell in chromeos build.

ui/wm/test/wm_test_helper.h

 // Copyright 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.
 
 #ifndef UI_WM_TEST_WM_TEST_HELPER_H_
 #define UI_WM_TEST_WM_TEST_HELPER_H_
 
 #include <memory>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "ui/aura/client/window_tree_client.h"
 #include "ui/aura/window_tree_host.h"
 
 namespace aura {
+class InputMethodGlue;
 class Window;
 class WindowTreeHost;
 namespace client {
 class DefaultCaptureClient;
 class FocusClient;
 }
 }
 
 namespace gfx {
 class Rect;
@@ skipping 19 matching lines @@
 
   aura::WindowTreeHost* host() { return host_.get(); }
 
   // Overridden from client::WindowTreeClient:
   aura::Window* GetDefaultParent(aura::Window* context,
                                  aura::Window* window,
                                  const gfx::Rect& bounds) override;
 
  private:
   std::unique_ptr<aura::WindowTreeHost> host_;
-
+  std::unique_ptr<aura::InputMethodGlue> input_method_glue_;
   std::unique_ptr<wm::CompoundEventFilter> root_window_event_filter_;
   std::unique_ptr<aura::client::DefaultCaptureClient> capture_client_;
   std::unique_ptr<aura::client::FocusClient> focus_client_;
 
   DISALLOW_COPY_AND_ASSIGN(WMTestHelper);
 };
 
 }  // namespace wm
 
 #endif  // UI_WM_TEST_WM_TEST_HELPER_H_