aura: Gesture event plumbing (skeleton).

ash/drag_drop/drag_drop_controller.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 ASH_DRAG_DROP_DRAG_DROP_CONTROLLER_H_
 #define ASH_DRAG_DROP_DRAG_DROP_CONTROLLER_H_
 #pragma once
 
 #include "ash/ash_export.h"
 #include "ui/aura/client/drag_drop_client.h"
@@ skipping 44 matching lines @@
   virtual void DragCancel() OVERRIDE;
   virtual bool IsDragDropInProgress() OVERRIDE;
 
   // Overridden from aura::EventFilter:
   virtual bool PreHandleKeyEvent(aura::Window* target,
                                  aura::KeyEvent* event) OVERRIDE;
   virtual bool PreHandleMouseEvent(aura::Window* target,
                                    aura::MouseEvent* event) OVERRIDE;
   virtual ui::TouchStatus PreHandleTouchEvent(aura::Window* target,
                                               aura::TouchEvent* event) OVERRIDE;
+  virtual ui::GestureStatus PreHandleGestureEvent(
+      aura::Window* target,
+      aura::GestureEvent* event) OVERRIDE;
 
  private:
   friend class ash::test::DragDropControllerTest;
 
   // Overridden from ui::LayerAnimationObserver:
   virtual void OnLayerAnimationEnded(
       const ui::LayerAnimationSequence* sequence) OVERRIDE;
   virtual void OnLayerAnimationAborted(
       const ui::LayerAnimationSequence* sequence) OVERRIDE;
   virtual void OnLayerAnimationScheduled(
@@ skipping 17 matching lines @@
   // Only be used for tests.
   bool should_block_during_drag_drop_;
 
   DISALLOW_COPY_AND_ASSIGN(DragDropController);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_DRAG_DROP_DRAG_DROP_CONTROLLER_H_