Add compile assertions to enforce the sizes of all structs and enums in the C...

ppapi/c/pp_point.h

 // Copyright (c) 2010 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_C_PP_POINT_H_
 #define PPAPI_C_PP_POINT_H_
 
 /**
  * @file
  * Defines the API ...
  *
  * @addtogroup PP
  * @{
  */
 
 #include "ppapi/c/pp_macros.h"
 #include "ppapi/c/pp_stdint.h"
 
 struct PP_Point {
   int32_t x;
   int32_t y;
 };
+PP_COMPILE_ASSERT_STRUCT_SIZE_IN_BYTES(PP_Point, 8);
 
 PP_INLINE struct PP_Point PP_MakePoint(int32_t x, int32_t y) {
   struct PP_Point ret;
   ret.x = x;
   ret.y = y;
   return ret;
 }
 
 /**
  * @}
  * End addtogroup PP
  */
 
 #endif  // PPAPI_C_PP_POINT_H_