Revert of Updated Khronos GLES2 headers.

ppapi/c/ppb_opengles2.h

 // Copyright (c) 2012 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.
 
 // This file is auto-generated from
 // gpu/command_buffer/build_gles2_cmd_buffer.py
 // DO NOT EDIT!
 
 // OpenGL ES interface.
 #ifndef PPAPI_C_PPB_OPENGLES2_H_
 #define PPAPI_C_PPB_OPENGLES2_H_
 
 #include "ppapi/c/pp_resource.h"
 
 #ifndef __gl2_h_
 typedef unsigned int GLenum;
 typedef void GLvoid;
+typedef long int GLintptr;
 typedef int GLsizei;
+typedef long int GLsizeiptr;
 typedef int GLint;
 typedef unsigned char GLboolean;
 typedef unsigned int GLuint;
 typedef unsigned int GLbitfield;
 typedef short GLshort;
 typedef float GLfloat;
 typedef float GLclampf;
 typedef signed char GLbyte;
 typedef unsigned char GLubyte;
 typedef int GLfixed;
 typedef unsigned short GLushort;
 typedef int GLclampx;
-#ifdef _WIN64
-typedef long long int GLintptr;
-typedef long long int GLsizeiptr;
-#else
-typedef long int GLintptr;
-typedef long int GLsizeiptr;
-#endif  // _WIN64
 #endif  // __gl2_h_
 
 #define PPB_OPENGLES2_INTERFACE_1_0 "PPB_OpenGLES2;1.0"
 #define PPB_OPENGLES2_INTERFACE PPB_OPENGLES2_INTERFACE_1_0
 
 struct PPB_OpenGLES2 {
   void (*ActiveTexture)(PP_Resource context, GLenum texture);
   void (*AttachShader)(PP_Resource context, GLuint program, GLuint shader);
   void (*BindAttribLocation)(
       PP_Resource context, GLuint program, GLuint index, const char* name);
@@ skipping 325 matching lines @@
   void (*BeginQueryEXT)(PP_Resource context, GLenum target, GLuint id);
   void (*EndQueryEXT)(PP_Resource context, GLenum target);
   void (*GetQueryivEXT)(
       PP_Resource context, GLenum target, GLenum pname, GLint* params);
   void (*GetQueryObjectuivEXT)(
       PP_Resource context, GLuint id, GLenum pname, GLuint* params);
 };
 
 #endif  // PPAPI_C_PPB_OPENGLES2_H_