Update from https://crrev.com/311076

gpu/command_buffer/service/gles2_cmd_validation_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 234 matching lines @@
 static const GLenum valid_image_usage_table[] = {
     GL_MAP_CHROMIUM,
     GL_SCANOUT_CHROMIUM,
 };
 
 static const GLenum valid_index_type_table[] = {
     GL_UNSIGNED_BYTE,
     GL_UNSIGNED_SHORT,
 };
 
+static const GLenum valid_indexed_buffer_target_table[] = {
+    GL_TRANSFORM_FEEDBACK_BUFFER,
+    GL_UNIFORM_BUFFER,
+};
+
 static const GLenum valid_matrix_mode_table[] = {
     GL_PATH_PROJECTION_CHROMIUM,
     GL_PATH_MODELVIEW_CHROMIUM,
 };
 
 static const GLenum valid_pixel_store_table[] = {
     GL_PACK_ALIGNMENT,
     GL_UNPACK_ALIGNMENT,
     GL_UNPACK_FLIP_Y_CHROMIUM,
     GL_UNPACK_PREMULTIPLY_ALPHA_CHROMIUM,
@@ skipping 321 matching lines @@
       get_max_index_type(valid_get_max_index_type_table,
                          arraysize(valid_get_max_index_type_table)),
       get_tex_param_target(valid_get_tex_param_target_table,
                            arraysize(valid_get_tex_param_target_table)),
       hint_mode(valid_hint_mode_table, arraysize(valid_hint_mode_table)),
       hint_target(valid_hint_target_table, arraysize(valid_hint_target_table)),
       image_internal_format(valid_image_internal_format_table,
                             arraysize(valid_image_internal_format_table)),
       image_usage(valid_image_usage_table, arraysize(valid_image_usage_table)),
       index_type(valid_index_type_table, arraysize(valid_index_type_table)),
+      indexed_buffer_target(valid_indexed_buffer_target_table,
+                            arraysize(valid_indexed_buffer_target_table)),
       matrix_mode(valid_matrix_mode_table, arraysize(valid_matrix_mode_table)),
       pixel_store(valid_pixel_store_table, arraysize(valid_pixel_store_table)),
       pixel_store_alignment(valid_pixel_store_alignment_table,
                             arraysize(valid_pixel_store_alignment_table)),
       pixel_type(valid_pixel_type_table, arraysize(valid_pixel_type_table)),
       program_parameter(valid_program_parameter_table,
                         arraysize(valid_program_parameter_table)),
       query_object_parameter(valid_query_object_parameter_table,
                              arraysize(valid_query_object_parameter_table)),
       query_parameter(valid_query_parameter_table,
@@ skipping 63 matching lines @@
                          arraysize(valid_vertex_attrib_size_table)),
       vertex_attrib_type(valid_vertex_attrib_type_table,
                          arraysize(valid_vertex_attrib_type_table)),
       vertex_attribute(valid_vertex_attribute_table,
                        arraysize(valid_vertex_attribute_table)),
       vertex_pointer(valid_vertex_pointer_table,
                      arraysize(valid_vertex_pointer_table)) {
 }
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_VALIDATION_IMPLEMENTATION_AUTOGEN_H_