Add support for GL_CHROMIUM_pixel_transfer_buffer_object.

gpu/command_buffer/client/gles2_c_lib_autogen.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!
 
 // These functions emulate GLES2 over command buffers.
 #ifndef GPU_COMMAND_BUFFER_CLIENT_GLES2_C_LIB_AUTOGEN_H_
@@ skipping 570 matching lines @@
     GLuint namespace_id, GLsizei n, const GLuint* ids) {
   gles2::GetGLContext()->DeleteSharedIdsCHROMIUM(namespace_id, n, ids);
 }
 void GLES2RegisterSharedIdsCHROMIUM(
     GLuint namespace_id, GLsizei n, const GLuint* ids) {
   gles2::GetGLContext()->RegisterSharedIdsCHROMIUM(namespace_id, n, ids);
 }
 GLboolean GLES2EnableFeatureCHROMIUM(const char* feature) {
   return gles2::GetGLContext()->EnableFeatureCHROMIUM(feature);
 }
+void* GLES2MapBufferCHROMIUM(GLuint target, GLenum access) {
+  return gles2::GetGLContext()->MapBufferCHROMIUM(target, access);
+}
+GLboolean GLES2UnmapBufferCHROMIUM(GLuint target) {
+  return gles2::GetGLContext()->UnmapBufferCHROMIUM(target);
+}
 void* GLES2MapBufferSubDataCHROMIUM(
     GLuint target, GLintptr offset, GLsizeiptr size, GLenum access) {
   return gles2::GetGLContext()->MapBufferSubDataCHROMIUM(
       target, offset, size, access);
 }
 void GLES2UnmapBufferSubDataCHROMIUM(const void* mem) {
   gles2::GetGLContext()->UnmapBufferSubDataCHROMIUM(mem);
 }
 void* GLES2MapTexSubImage2DCHROMIUM(
     GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width,
@@ skipping 80 matching lines @@
 }
 void GLES2BindTexImage2DCHROMIUM(GLenum target, GLint imageId) {
   gles2::GetGLContext()->BindTexImage2DCHROMIUM(target, imageId);
 }
 void GLES2ReleaseTexImage2DCHROMIUM(GLenum target, GLint imageId) {
   gles2::GetGLContext()->ReleaseTexImage2DCHROMIUM(target, imageId);
 }
 
 #endif  // GPU_COMMAND_BUFFER_CLIENT_GLES2_C_LIB_AUTOGEN_H_