gpu: Add CHROMIUM_gpu_memory_buffer_image extension.

gpu/command_buffer/client/gles2_implementation_autogen.h

 // Copyright 2014 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
 // It's formatted by clang-format using chromium coding style:
 //    clang-format -i -style=chromium filename
 // DO NOT EDIT!
 
@@ skipping 610 matching lines @@
                                    GLsizei height,
                                    GLenum internalformat,
                                    GLenum usage) OVERRIDE;
 
 virtual void DestroyImageCHROMIUM(GLuint image_id) OVERRIDE;
 
 virtual void GetImageParameterivCHROMIUM(GLuint image_id,
                                          GLenum pname,
                                          GLint* params) OVERRIDE;
 
+virtual GLuint CreateGpuMemoryBufferImageCHROMIUM(GLsizei width,
+                                                  GLsizei height,
+                                                  GLenum internalformat,
+                                                  GLenum usage) OVERRIDE;
+
 virtual void GetTranslatedShaderSourceANGLE(GLuint shader,
                                             GLsizei bufsize,
                                             GLsizei* length,
                                             char* source) OVERRIDE;
 
 virtual void PostSubBufferCHROMIUM(GLint x,
                                    GLint y,
                                    GLint width,
                                    GLint height) OVERRIDE;
 
@@ skipping 98 matching lines @@
                                           GLfloat uv_x,
                                           GLfloat uv_y,
                                           GLfloat uv_width,
                                           GLfloat uv_height) OVERRIDE;
 
 virtual void MatrixLoadfCHROMIUM(GLenum matrixMode, const GLfloat* m) OVERRIDE;
 
 virtual void MatrixLoadIdentityCHROMIUM(GLenum matrixMode) OVERRIDE;
 
 #endif  // GPU_COMMAND_BUFFER_CLIENT_GLES2_IMPLEMENTATION_AUTOGEN_H_