Add new MouseCursor interface for setting the mouse cursor.

ppapi/thunk/ppb_cursor_control_api.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 PPAPI_THUNK_CURSOR_CONTROL_API_H_
-#define PPAPI_THUNK_CURSOR_CONTROL_API_H_
-
-#include "ppapi/c/dev/ppb_cursor_control_dev.h"
-#include "ppapi/shared_impl/api_id.h"
-
-namespace ppapi {
-namespace thunk {
-
-class PPB_CursorControl_FunctionAPI {
- public:
-  virtual ~PPB_CursorControl_FunctionAPI() {}
-
-  virtual PP_Bool SetCursor(PP_Instance instance,
-                            PP_CursorType_Dev type,
-                            PP_Resource custom_image_id,
-                            const PP_Point* hot_spot) = 0;
-  virtual PP_Bool LockCursor(PP_Instance instance) = 0;
-  virtual PP_Bool UnlockCursor(PP_Instance instance) = 0;
-  virtual PP_Bool HasCursorLock(PP_Instance instance) = 0;
-  virtual PP_Bool CanLockCursor(PP_Instance instance) = 0;
-
-  static const ApiID kApiID = API_ID_PPB_CURSORCONTROL;
-
-};
-
-}  // namespace thunk
-}  // namespace ppapi
-
-#endif  // PPAPI_THUNK_CURSOR_CONTROL_API_H_