aura-x11: Add custom web cursor support.

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"
@@ skipping 49 matching lines @@
 
   // Sets the OS capture to the root window.
   virtual void SetCapture() = 0;
 
   // Releases OS capture of the root window.
   virtual void ReleaseCapture() = 0;
 
   // Sets the currently displayed cursor.
   virtual void SetCursor(gfx::NativeCursor cursor) = 0;
 
+  // Sets a custom cursor.
+  virtual void SetCustomCursor(const gfx::PlatformCursor& cursor) = 0;
+
   // Shows or hides the cursor.
   virtual void ShowCursor(bool show) = 0;
 
   // Queries the mouse's current position relative to the host window.
   // The position is constrained within the host window.
   // You should probably call RootWindow::last_mouse_location() instead; this
   // method can be expensive.
   virtual gfx::Point QueryMouseLocation() = 0;
 
   // Clips the cursor to the bounds of the root window until UnConfineCursor().
@@ skipping 10 matching lines @@
 #if !defined(OS_WIN)
   // See documentation for RootWindow::GetDispatcher().
   virtual MessageLoop::Dispatcher* GetDispatcher() = 0;
 #endif
 #endif
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_ROOT_WINDOW_HOST_H_