Add new MouseCursor interface for setting the mouse cursor.

ppapi/native_client/src/shared/ppapi_proxy/ppb_cursor_control.srpc

-# Copyright (c) 2011 The Native Client Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-#
-# RPC methods used to implement PPB_CursorControl calls from the plugin.
-# See ppapi/c/ppb_cursor_control_dev.h for interface details.
-
-{
- 'name': 'PpbCursorControlRpc',
- 'rpcs': [
-          {'name': 'PPB_CursorControl_SetCursor',
-           'inputs': [['instance', 'PP_Instance'],    # PP_Instance
-                      ['type', 'int32_t'],            # PP_CursorType_Dev
-                      ['custom_image', 'PP_Resource'],  # PP_Resource
-                      ['hot_spot', 'char[]'],         # PP_Point
-                     ],
-           'outputs': [['success', 'int32_t'],        # PP_Bool
-                      ]
-          },
-          {'name': 'PPB_CursorControl_LockCursor',
-           'inputs': [['instance', 'PP_Instance'],    # PP_Instance
-                     ],
-           'outputs': [['success', 'int32_t'],        # PP_Bool
-                      ]
-          },
-          {'name': 'PPB_CursorControl_UnlockCursor',
-           'inputs': [['instance', 'PP_Instance'],    # PP_Instance
-                     ],
-           'outputs': [['success', 'int32_t'],        # PP_Bool
-                      ]
-          },
-          {'name': 'PPB_CursorControl_HasCursorLock',
-           'inputs': [['instance', 'PP_Instance'],    # PP_Instance
-                     ],
-           'outputs': [['success', 'int32_t'],        # PP_Bool
-                      ]
-          },
-          {'name': 'PPB_CursorControl_CanLockCursor',
-           'inputs': [['instance', 'PP_Instance'],    # PP_Instance
-                     ],
-           'outputs': [['success', 'int32_t'],        # PP_Bool
-                      ]
-          },
-         ]
-}