gpu: Add calling convention for win32

third_party/khronos/KHR/khrplatform.h

 #ifndef __khrplatform_h_
 #define __khrplatform_h_
 
 /*
 ** Copyright (c) 2008-2009 The Khronos Group Inc.
 **
 ** Permission is hereby granted, free of charge, to any person obtaining a
 ** copy of this software and/or associated documentation files (the
 ** "Materials"), to deal in the Materials without restriction, including
 ** without limitation the rights to use, copy, modify, merge, publish,
@@ skipping 113 matching lines @@
 
 #undef KHRONOS_APICALL
 #if defined(GLES2_USE_MOJO)
 #include "third_party/mojo/src/mojo/public/c/gles2/gles2_export.h"
 #define KHRONOS_APICALL MOJO_GLES2_EXPORT
 #else
 #include "gpu/command_buffer/client/gles2_c_lib_export.h"
 #define KHRONOS_APICALL GLES2_C_LIB_EXPORT
 #endif
 
-#undef KHRONOS_APIENTRY
-#define KHRONOS_APIENTRY
-
 /*-------------------------------------------------------------------------
  * Definition of KHRONOS_APIATTRIBUTES
  *-------------------------------------------------------------------------
  * This follows the closing parenthesis of the function prototype arguments.
  */
 #if defined (__ARMCC_2__)
 #define KHRONOS_APIATTRIBUTES __softfp
 #else
 #define KHRONOS_APIATTRIBUTES
 #endif
@@ skipping 142 matching lines @@
  * Values other than zero should be considered to be true.  Therefore
  * comparisons should not be made against KHRONOS_TRUE.
  */
 typedef enum {
     KHRONOS_FALSE = 0,
     KHRONOS_TRUE  = 1,
     KHRONOS_BOOLEAN_ENUM_FORCE_SIZE = KHRONOS_MAX_ENUM
 } khronos_boolean_enum_t;
 
 #endif /* __khrplatform_h_ */