Fix 'gn check' errors in //ui/* targets.

ui/compositor/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("//testing/test.gni")
 
 component("compositor") {
   sources = [
     "closure_animation_observer.cc",
@@ skipping 97 matching lines @@
   ]
 
   public_deps = [
     ":compositor",
   ]
   deps = [
     "//base/test:test_support",
     "//cc",
     "//cc/surfaces",
     "//cc:test_support",
+    "//gpu/command_buffer/client:gl_in_process_context",
+    "//gpu/command_buffer/client:gles2_c_lib",
+    "//gpu/command_buffer/client:gles2_implementation",
+    "//gpu/command_buffer/common:gles2_utils",
+    "//gpu/skia_bindings",
     "//skia",
     "//testing/gtest",
     "//third_party/WebKit/public:blink_minimal",
     "//ui/base",
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//ui/gl",
   ]
 
   if (use_x11) {
@@ skipping 33 matching lines @@
 #    "//ui/gfx",
 #    "//ui/gfx/geometry",
 #    "//ui/gl",
 #    "//ui/resources",
 #  ]
 #
 #  if (is_linux) {
 #    deps += [ "//third_party/mesa:osmesa" ]
 #  }
 #}