Add CHROMIUM_ycbcr_422_image extension.

gpu/command_buffer/service/gles2_cmd_validation_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 345 matching lines @@
 
 static const GLenum valid_hint_target_table[] = {
     GL_GENERATE_MIPMAP_HINT,
 };
 
 static const GLenum valid_hint_target_table_es3[] = {
     GL_FRAGMENT_SHADER_DERIVATIVE_HINT,
 };
 
 static const GLenum valid_image_internal_format_table[] = {
-    GL_RGB, GL_RGB_YUV_420_CHROMIUM, GL_RGBA,
+    GL_RGB, GL_RGB_YUV_420_CHROMIUM, GL_RGB_YCBCR_422_CHROMIUM, GL_RGBA,
 };
 
 static const GLenum valid_image_usage_table[] = {
     GL_MAP_CHROMIUM, GL_SCANOUT_CHROMIUM,
 };
 
 static const GLenum valid_index_type_table[] = {
     GL_UNSIGNED_BYTE, GL_UNSIGNED_SHORT,
 };
 
@@ skipping 814 matching lines @@
       arraysize(valid_texture_internal_format_storage_table_es3));
   texture_parameter.AddValues(valid_texture_parameter_table_es3,
                               arraysize(valid_texture_parameter_table_es3));
   vertex_attrib_type.AddValues(valid_vertex_attrib_type_table_es3,
                                arraysize(valid_vertex_attrib_type_table_es3));
   vertex_attribute.AddValues(valid_vertex_attribute_table_es3,
                              arraysize(valid_vertex_attribute_table_es3));
 }
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_VALIDATION_IMPLEMENTATION_AUTOGEN_H_