Fix most of the "gn check" errors in ui/*

ui/wm/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.
 
 component("wm") {
   sources = [
     "core/accelerator_delegate.h",
     "core/accelerator_filter.cc",
     "core/accelerator_filter.h",
     "core/base_focus_rules.cc",
@@ skipping 78 matching lines @@
   ]
 }
 
 static_library("test_support") {
   sources = [
     "test/wm_test_helper.cc",
     "test/wm_test_helper.h",
   ]
 
   deps = [
+    ":wm",
     "//skia",
     "//ui/aura",
+    "//ui/aura:test_support",
     "//ui/base",
     "//ui/events",
     "//ui/events:events_base",
   ]
 }
 
-# TODO(GYP) enable the wm_unittests target when all dependencies have been
-# resolved. Some transitive deps aren't converted yet.
-if (false) {
-
 test("wm_unittests") {
   sources = [
     "test/run_all_unittests.cc",
     "core/compound_event_filter_unittest.cc",
     "core/cursor_manager_unittest.cc",
     "core/focus_controller_unittest.cc",
     "core/input_method_event_filter_unittest.cc",
     "core/image_grid_unittest.cc",
     "core/nested_accelerator_controller_unittest.cc",
     "core/shadow_controller_unittest.cc",
@@ skipping 13 matching lines @@
     "//testing/gtest",
     "//ui/aura",
     "//ui/aura:test_support",
     "//ui/base",
     "//ui/compositor",
     "//ui/events",
     "//ui/events:events_base",
     "//ui/events/platform",
     "//ui/gfx",
     "//ui/gfx/geometry",
+    "//ui/gl",
   ]
 }
-
-}