Load the GL_KHR_debug entry points and log messages they produce.

ui/gl/gl_enums_implementation_autogen.h

 // 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!
 
@@ skipping 3433 matching lines @@
     {
         0x9500, "GL_PERFQUERY_GPA_EXTENDED_COUNTERS_INTEL",
     },
     {
         0xFFFFFFFF, "GL_ALL_SHADER_BITS_EXT",
     },
     {
         1, "GL_ES_VERSION_2_0",
     },
     {
+        16, "GL_MAILBOX_SIZE_CHROMIUM",
+    },
+    {
         24, "GL_SYNC_TOKEN_SIZE_CHROMIUM",
     },
-    {
-        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]);