Introduce GLStubApi

ui/gl/gl_enums_implementation_autogen.h

-// Copyright 2014 The Chromium Authors. All rights reserved.
+// Copyright 2016 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
 // ui/gl/generate_bindings.py
 // It's formatted by clang-format using chromium coding style:
 //    clang-format -i -style=chromium filename
 // DO NOT EDIT!
 
 static const GLEnums::EnumToString enum_to_string_table[] = {
@@ skipping 633 matching lines @@
     {
         0x78FA, "GL_RGB_YCRCB_420_CHROMIUM",
     },
     {
         0x78FB, "GL_RGB_YCBCR_422_CHROMIUM",
     },
     {
         0x78FC, "GL_RGB_YCBCR_420V_CHROMIUM",
     },
     {
-        0x78FD, "GL_GPU_MEMORY_BUFFER_ID",
-    },
-    {
         0x8, "GL_CA_LAYER_EDGE_TOP_CHROMIUM",
     },
     {
         0x80000000, "GL_MULTISAMPLE_BUFFER_BIT7_QCOM",
     },
     {
         0x8001, "GL_CONSTANT_COLOR",
     },
     {
         0x8002, "GL_ONE_MINUS_CONSTANT_COLOR",
@@ skipping 2790 matching lines @@
     },
     {
         64, "GL_MAILBOX_SIZE_CHROMIUM",
     },
 };
 
 const GLEnums::EnumToString* const GLEnums::enum_to_string_table_ =
     enum_to_string_table;
 const size_t GLEnums::enum_to_string_table_len_ =
     sizeof(enum_to_string_table) / sizeof(enum_to_string_table[0]);