aura: Add touch-event support for RWHVA.

content/browser/renderer_host/web_input_event_aura.h

 // Copyright (c) 2011 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 CONTENT_BROWSER_RENDERER_HOST_WEB_INPUT_EVENT_AURA_H_
 #define CONTENT_BROWSER_RENDERER_HOST_WEB_INPUT_EVENT_AURA_H_
 #pragma once
 
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebInputEvent.h"
 
 namespace aura {
 class KeyEvent;
 class MouseEvent;
+class TouchEvent;
 }
 
 namespace content {
 
 WebKit::WebMouseEvent MakeWebMouseEvent(aura::MouseEvent* event);
 WebKit::WebMouseWheelEvent MakeWebMouseWheelEvent(aura::MouseEvent* event);
 WebKit::WebKeyboardEvent MakeWebKeyboardEvent(aura::KeyEvent* event);
 
-// TODO(beng): WebKit::WebMouseWheelEvent
+// Updates the WebTouchEvent based on the TouchEvent. It returns the updated
+// WebTouchPoint contained in the WebTouchEvent, or NULL if no point was
+// updated.
+WebKit::WebTouchPoint* UpdateWebTouchEvent(aura::TouchEvent* event,
+                                           WebKit::WebTouchEvent* web_event);
+
 
 }
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_WEB_INPUT_EVENT_AURA_H_