Implement TransformFeedbackManager in GPU command buffer.

gpu/command_buffer/common/gles2_cmd_utils_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 2986 matching lines @@
     {
         0x9248, "GL_OVERLAY_TRANSFORM_ROTATE_90_CHROMIUM",
     },
     {
         0x9249, "GL_OVERLAY_TRANSFORM_ROTATE_180_CHROMIUM",
     },
     {
         0x924A, "GL_OVERLAY_TRANSFORM_ROTATE_270_CHROMIUM",
     },
     {
-        0x924B, "GL_SUBSCRIBED_VALUES_BUFFER_CHROMIUM",
-    },
-    {
-        0x924C, "GL_MOUSE_POSITION_CHROMIUM",
-    },
-    {
         0x9250, "GL_SHADER_BINARY_DMP",
     },
     {
         0x9251, "GL_SMAPHS30_PROGRAM_BINARY_DMP",
     },
     {
         0x9252, "GL_SMAPHS_PROGRAM_BINARY_DMP",
     },
     {
         0x9253, "GL_DMP_PROGRAM_BINARY_DMP",
@@ skipping 1989 matching lines @@
 
 std::string GLES2Util::GetStringVertexPointer(uint32_t value) {
   static const EnumToString string_table[] = {
       {GL_VERTEX_ATTRIB_ARRAY_POINTER, "GL_VERTEX_ATTRIB_ARRAY_POINTER"},
   };
   return GLES2Util::GetQualifiedEnumString(string_table,
                                            arraysize(string_table), value);
 }
 
 #endif  // GPU_COMMAND_BUFFER_COMMON_GLES2_CMD_UTILS_IMPLEMENTATION_AUTOGEN_H_