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

gpu/command_buffer/service/BUILD.gn

 # 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.
 
 import("//build/config/ui.gni")
 import("//third_party/protobuf/proto_library.gni")
 
 source_set("service") {
   sources = [
     "async_pixel_transfer_delegate.cc",
@@ skipping 109 matching lines @@
   configs += [
     "//gpu:gpu_implementation",
     "//third_party/khronos:khronos_headers",
   ]
 
   # Prefer mesa GL headers to system headers, which cause problems on Win.
   include_dirs = [ "//third_party/mesa/src/include" ]
 
   public_deps = [
     "//gpu/command_buffer/common",
+    "//gpu/command_buffer/common:gles2_utils",
   ]
   deps = [
     ":disk_cache_proto",
     "//base",
     "//base/third_party/dynamic_annotations",
     "//crypto",
+    "//gpu/command_buffer/client",
+    "//gpu/command_buffer/client:gpu_memory_buffer_manager",
     "//gpu/config",
     "//third_party/angle:translator",
     "//third_party/protobuf:protobuf_lite",
     "//third_party/re2",
     "//third_party/smhasher:cityhash",
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//ui/gl",
   ]
 
@@ skipping 20 matching lines @@
     configs -= [ "//build/config/compiler:optimize" ]
     configs += [ "//build/config/compiler:optimize_max" ]
   }
 }
 
 proto_library("disk_cache_proto") {
   sources = [
     "disk_cache_proto.proto",
   ]
 }