Refactoring the ownership of ui::InputMethod.

ui/aura/window_tree_host_ozone.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_AURA_WINDOW_TREE_HOST_OZONE_H_
 #define UI_AURA_WINDOW_TREE_HOST_OZONE_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "ui/aura/window_tree_host.h"
-#include "ui/events/event_source.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/platform_window/platform_window_delegate.h"
 
 namespace ui {
 class PlatformWindow;
 }
 
 namespace aura {
 
 class AURA_EXPORT WindowTreeHostOzone : public WindowTreeHost,
-                                        public ui::EventSource,
                                         public ui::PlatformWindowDelegate {
  public:
   explicit WindowTreeHostOzone(const gfx::Rect& bounds);
   ~WindowTreeHostOzone() override;
 
  protected:
   // WindowTreeHost:
   ui::EventSource* GetEventSource() override;
   gfx::AcceleratedWidget GetAcceleratedWidget() override;
   void ShowImpl() override;
@@ skipping 14 matching lines @@
   void OnBoundsChanged(const gfx::Rect&) override;
   void OnDamageRect(const gfx::Rect& damaged_region) override;
   void DispatchEvent(ui::Event* event) override;
   void OnCloseRequest() override;
   void OnClosed() override;
   void OnWindowStateChanged(ui::PlatformWindowState new_state) override;
   void OnLostCapture() override;
   void OnAcceleratedWidgetAvailable(gfx::AcceleratedWidget widget) override;
   void OnActivationChanged(bool active) override;
 
-  // ui::EventSource overrides.
-  ui::EventProcessor* GetEventProcessor() override;
-
   // Platform-specific part of this WindowTreeHost.
   scoped_ptr<ui::PlatformWindow> platform_window_;
 
   // The identifier used to create a compositing surface.
   gfx::AcceleratedWidget widget_;
 
   // Current Aura cursor.
   gfx::NativeCursor current_cursor_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowTreeHostOzone);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_WINDOW_TREE_HOST_OZONE_H_