Makes DesktopWindowTreeHostXxx to dispatch key event to InputMethod.

ui/aura/window_tree_host.h

 // 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.
 
 #ifndef UI_AURA_WINDOW_TREE_HOST_H_
 #define UI_AURA_WINDOW_TREE_HOST_H_
 
 #include <vector>
 
 #include "base/event_types.h"
@@ skipping 186 matching lines @@
   virtual void OnCursorVisibilityChangedNative(bool show) = 0;
 
   // Shows the WindowTreeHost.
   virtual void ShowImpl() = 0;
 
   // Hides the WindowTreeHost.
   virtual void HideImpl() = 0;
 
   // Overridden from ui::EventSource:
   ui::EventProcessor* GetEventProcessor() override;
-  ui::EventDispatchDetails DeliverEventToProcessor(ui::Event* event) override;
 
  private:
   friend class test::WindowTreeHostTestApi;
 
   // Moves the cursor to the specified location. This method is internally used
   // by MoveCursorTo() and MoveCursorToHostLocation().
   void MoveCursorToInternal(const gfx::Point& root_location,
                             const gfx::Point& host_location);
 
   // We don't use a scoped_ptr for |window_| since we need this ptr to be valid
@@ skipping 21 matching lines @@
 
   // Whether the InputMethod instance is owned by this WindowTreeHost.
   bool owned_input_method_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowTreeHost);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_WINDOW_TREE_HOST_H_