aura: Remove event-dispatch methods from WindowTreeHostDelegate interface.

ui/aura/root_window.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_ROOT_WINDOW_H_
 #define UI_AURA_ROOT_WINDOW_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 249 matching lines @@
 
   // Overridden from ui::LayerAnimationObserver:
   virtual void OnLayerAnimationEnded(
       ui::LayerAnimationSequence* animation) OVERRIDE;
   virtual void OnLayerAnimationScheduled(
       ui::LayerAnimationSequence* animation) OVERRIDE;
   virtual void OnLayerAnimationAborted(
       ui::LayerAnimationSequence* animation) OVERRIDE;
 
   // Overridden from aura::WindowTreeHostDelegate:
-  virtual bool OnHostKeyEvent(ui::KeyEvent* event) OVERRIDE;
-  virtual bool OnHostMouseEvent(ui::MouseEvent* event) OVERRIDE;
-  virtual bool OnHostScrollEvent(ui::ScrollEvent* event) OVERRIDE;
-  virtual bool OnHostTouchEvent(ui::TouchEvent* event) OVERRIDE;
   virtual void OnHostCancelMode() OVERRIDE;
   virtual void OnHostActivated() OVERRIDE;
   virtual void OnHostLostWindowCapture() OVERRIDE;
   virtual void OnHostLostMouseGrab() OVERRIDE;
   virtual void OnHostMoved(const gfx::Point& origin) OVERRIDE;
   virtual void OnHostResized(const gfx::Size& size) OVERRIDE;
   virtual RootWindow* AsRootWindow() OVERRIDE;
   virtual const RootWindow* AsRootWindow() const OVERRIDE;
   virtual ui::EventProcessor* GetEventProcessor() OVERRIDE;
 
@@ skipping 59 matching lines @@
 
   // Used to schedule DispatchHeldEvents() when |move_hold_count_| goes to 0.
   base::WeakPtrFactory<RootWindow> held_event_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RootWindow);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_ROOT_WINDOW_H_