Revert 132934 - this change seems to break many webgl related layout tests

gpu/command_buffer/service/gles2_cmd_validation_implementation_autogen.h

 // Copyright (c) 2012 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
 // DO NOT EDIT!
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_VALIDATION_IMPLEMENTATION_AUTOGEN_H_  // NOLINT
 #define GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_VALIDATION_IMPLEMENTATION_AUTOGEN_H_  // NOLINT
@@ skipping 221 matching lines @@
 };
 
 static GLenum valid_index_type_table[] = {
   GL_UNSIGNED_BYTE,
   GL_UNSIGNED_SHORT,
 };
 
 static GLenum valid_pixel_store_table[] = {
   GL_PACK_ALIGNMENT,
   GL_UNPACK_ALIGNMENT,
-  GL_UNPACK_FLIP_Y_CHROMIUM,
-  GL_UNPACK_PREMULTIPLY_ALPHA_CHROMIUM,
 };
 
 static GLint valid_pixel_store_alignment_table[] = {
   1,
   2,
   4,
   8,
 };
 
 static GLenum valid_pixel_type_table[] = {
@@ skipping 365 matching lines @@
           valid_vertex_attribute_table, arraysize(
               valid_vertex_attribute_table)),
       vertex_pointer(
           valid_vertex_pointer_table, arraysize(valid_vertex_pointer_table)),
       zero_only(
           valid_zero_only_table, arraysize(valid_zero_only_table)) {
 }
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_VALIDATION_IMPLEMENTATION_AUTOGEN_H_  // NOLINT