aura-touch: Refactor some code so that both cros and win-aura can share some code.

content/browser/renderer_host/ui_events_helper.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 CONTENT_BROWSER_RENDERER_HOST_UI_EVENTS_HELPER_H_
 #define CONTENT_BROWSER_RENDERER_HOST_UI_EVENTS_HELPER_H_
 
 #include "base/memory/scoped_vector.h"
 #include "content/common/content_export.h"
 
 namespace WebKit {
 class WebTouchEvent;
+class WebTouchPoint;
 }
 
 namespace ui {
 class TouchEvent;
 }
 
 namespace content {
 
 // Creates a list of ui::TouchEvents out of a single WebTouchEvent.
 // A WebTouchEvent can contain information about a number of WebTouchPoints,
 // whereas a ui::TouchEvent contains information about a single touch-point. So
 // it is possible to create more than one ui::TouchEvents out of a single
 // WebTouchEvent.
 CONTENT_EXPORT bool MakeUITouchEventsFromWebTouchEvents(
     const WebKit::WebTouchEvent& touch,
     ScopedVector<ui::TouchEvent>* list);
+
+int EventFlagsToWebEventModifiers(int flags);
+
+// 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* UpdateWebTouchEventFromUIEvent(
+    ui::TouchEvent* event,
+    WebKit::WebTouchEvent* web_event);
 }
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_UI_EVENTS_HELPER_H_