This patch implements Chromium's Aura gesture recognizer in terms of utouch-grail and utouch-frame …

ui/aura/root_window_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_ROOT_WINDOW_HOST_H_
 #define UI_AURA_ROOT_WINDOW_HOST_H_
 #pragma once
 
 #include "base/message_loop.h"
 #include "ui/aura/cursor.h"
 #include "ui/gfx/native_widget_types.h"
 
 namespace gfx {
 class Point;
 class Rect;
 class Size;
 }
 
 namespace aura {
 
+typedef unsigned long NativeHandle;
+
 class RootWindow;
 
 // RootWindowHost bridges between a native window and the embedded RootWindow.
 // It provides the accelerated widget and maps events from the native os to
 // aura.
 class RootWindowHost {
  public:
   virtual ~RootWindowHost() {}
 
   // Creates a new RootWindowHost. The caller owns the returned value.
@@ skipping 45 matching lines @@
   virtual bool ConfineCursorToRootWindow() = 0;
   virtual void UnConfineCursor() = 0;
 
   // Moves the cursor to the specified location relative to the root window.
   virtual void MoveCursorTo(const gfx::Point& location) = 0;
 
   // Posts |native_event| to the platform's event queue.
 #if !defined(OS_MACOSX)
   virtual void PostNativeEvent(const base::NativeEvent& native_event) = 0;
 #endif
+
+  // Accesses the underlying native window.
+  virtual NativeHandle GetNativeWindow() const = 0;
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_ROOT_WINDOW_HOST_H_
+