Add support for GL_CHROMIUM_pixel_transfer_buffer_object.

gpu/command_buffer/client/gles2_implementation_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!
 
 // This file is included by gles2_implementation.h to declare the
 // GL api functions.
@@ skipping 416 matching lines @@
     GLuint namespace_id, GLuint id_offset, GLsizei n, GLuint* ids) OVERRIDE;
 
 virtual void DeleteSharedIdsCHROMIUM(
     GLuint namespace_id, GLsizei n, const GLuint* ids) OVERRIDE;
 
 virtual void RegisterSharedIdsCHROMIUM(
     GLuint namespace_id, GLsizei n, const GLuint* ids) OVERRIDE;
 
 virtual GLboolean EnableFeatureCHROMIUM(const char* feature) OVERRIDE;
 
+virtual void* MapBufferCHROMIUM(GLuint target, GLenum access) OVERRIDE;
+
+virtual GLboolean UnmapBufferCHROMIUM(GLuint target) OVERRIDE;
+
 virtual void* MapBufferSubDataCHROMIUM(
     GLuint target, GLintptr offset, GLsizeiptr size, GLenum access) OVERRIDE;
 
 virtual void UnmapBufferSubDataCHROMIUM(const void* mem) OVERRIDE;
 
 virtual void* MapTexSubImage2DCHROMIUM(
     GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width,
     GLsizei height, GLenum format, GLenum type, GLenum access) OVERRIDE;
 
 virtual void UnmapTexSubImage2DCHROMIUM(const void* mem) OVERRIDE;
@@ skipping 54 matching lines @@
 virtual void BindTexImage2DCHROMIUM(GLenum target, GLint imageId) OVERRIDE;
 
 virtual void ReleaseTexImage2DCHROMIUM(GLenum target, GLint imageId) OVERRIDE;
 
 virtual void TraceBeginCHROMIUM(const char* name) OVERRIDE;
 
 virtual void TraceEndCHROMIUM() OVERRIDE;
 
 #endif  // GPU_COMMAND_BUFFER_CLIENT_GLES2_IMPLEMENTATION_AUTOGEN_H_