Make //gpu/* pass gn check (and make it gn checked).

.gn

-# This file is used by the experimental meta-buildsystem in src/tools/gn to
-# find the root of the source tree and to set startup options.
+# Copyright 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.
+
+# This file is used by the gn meta-buildsystem find the root of the source tree
+# and to set startup options.
 
 # The location of the build configuration file.
 buildconfig = "//build/config/BUILDCONFIG.gn"
 
 # The secondary source root is a parallel directory tree where
 # GN build files are placed when they can not be placed directly
 # in the source tree, e.g. for third party source trees.
 secondary_source = "//build/secondary/"
 
 # The set of targets known to pass 'gn check'. When all targets pass, remove
 # this.
 check_targets = [
   "//apps/*",
   "//base/*",
   "//benchmarks/*",
   "//build/*",
   "//buildtools/*",
   "//cc/*",
   "//crypto/*",
   "//dart/*",
   "//device/*",
   "//examples/*",
+  "//fusl/*",
   "//gin/*",
+  "//gpu/*",
   "//mojo/*",
   "//mojom/*",
   "//native_client/*",
   "//services/*",
   "//shell/*",
   "//skia/*",
   "//testing/*",
   "//tools/*",
   "//ui/*",
   "//url/*",
   "//v8/*",
 ]