Add new MouseCursor interface for setting the mouse cursor.

ppapi/shared_impl/ppb_instance_shared.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_SHARED_IMPL_PPB_INSTANCE_SHARED_H_
 #define PPAPI_SHARED_IMPL_PPB_INSTANCE_SHARED_H_
 
 #include "base/compiler_specific.h"
 #include "ppapi/c/pp_stdint.h"
 #include "ppapi/shared_impl/ppapi_shared_export.h"
@@ skipping 11 matching lines @@
                    PP_LogLevel_Dev log_level,
                    PP_Var value) OVERRIDE;
   virtual void LogWithSource(PP_Instance instance,
                              PP_LogLevel_Dev log_level,
                              PP_Var source,
                              PP_Var value) OVERRIDE;
 
   // Error checks the given resquest to Request[Filtering]InputEvents. Returns
   // PP_OK if the given classes are all valid, PP_ERROR_NOTSUPPORTED if not.
   int32_t ValidateRequestInputEvents(bool is_filtering, uint32_t event_classes);
+
+  bool ValidateSetCursorParams(PP_MouseCursor_Type type,
+                               PP_Resource image,
+                               const PP_Point* hot_spot);
 };
 
 }  // namespace ppapi
 
 #endif  // PPAPI_SHARED_IMPL_PPB_INSTANCE_SHARED_H_