gpu: Remove async texture uploads.

ui/gl/gl_enums_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
 // 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 1009 matching lines @@
     {
         0x80AB, "GL_SAMPLE_COVERAGE_INVERT",
     },
     {
         0x8A3D, "GL_UNIFORM_MATRIX_STRIDE",
     },
     {
         0x8E7D, "GL_MAX_PATCH_VERTICES_EXT",
     },
     {
-        0x6005, "GL_ASYNC_PIXEL_UNPACK_COMPLETED_CHROMIUM",
-    },
-    {
         0x9105, "GL_TEXTURE_BINDING_2D_MULTISAMPLE_ARRAY_OES",
     },
     {
         0x8E7E, "GL_MAX_TESS_GEN_LEVEL_EXT",
     },
     {
         0x9102, "GL_TEXTURE_2D_MULTISAMPLE_ARRAY_OES",
     },
     {
         0x8C40, "GL_SRGB_EXT",
@@ skipping 2352 matching lines @@
     },
     {
         0x8BC6, "GL_PERFMON_RESULT_AMD",
     },
 };
 
 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]);