Synchronize GN build configuration with Chrome

gpu/command_buffer/client/BUILD.gn

 # Copyright (c) 2013 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.
 
 source_set("client") {
   sources = [
     "cmd_buffer_helper.cc",
     "cmd_buffer_helper.h",
     "fenced_allocator.cc",
     "fenced_allocator.h",
@@ skipping 28 matching lines @@
     deps = [
       ":gles2_cmd_helper_sources",
     ]
   }
 }
 
 source_set("gles2_cmd_helper_sources") {
   visibility = [
     ":gles2_cmd_helper",
     "//gpu",
+    "//mojo/gles2:control_thunks",
   ]
   sources = [
     "gles2_cmd_helper.cc",
     "gles2_cmd_helper.h",
     "gles2_cmd_helper_autogen.h",
   ]
 
   configs += [
     # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
     "//build/config/compiler:no_size_t_to_int_warning",
@@ skipping 154 matching lines @@
   ]
   deps = [
     ":client",
     ":gles2_implementation_no_check",
     ":gles2_interface",
     "//base",
     "//base/third_party/dynamic_annotations",
     "//gpu/command_buffer/common",
   ]
 }