Work on GN build, mostly in //ui

ui/wm/wm.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
+      # GN version: //ui/wm
       'target_name': 'wm',
       'type': '<(component)',
       'dependencies': [
         '../../base/base.gyp:base',
         '../../skia/skia.gyp:skia',
         '../aura/aura.gyp:aura',
         '../compositor/compositor.gyp:compositor',
         '../events/events.gyp:events',
         '../events/events.gyp:events_base',
         '../gfx/gfx.gyp:gfx_geometry',
@@ skipping 65 matching lines @@
         'core/window_util.h',
         'core/wm_core_switches.cc',
         'core/wm_core_switches.h',
         'core/wm_state.cc',
         'core/wm_state.h',
         'public/window_types.h',
         'wm_export.h',
       ],
     },
     {
+      # GN version: //ui/wm:test_support
       'target_name': 'wm_test_support',
       'type': 'static_library',
       'dependencies': [
         '../../skia/skia.gyp:skia',
         '../aura/aura.gyp:aura',
         '../base/ui_base.gyp:ui_base',
         '../events/events.gyp:events',
         '../events/events.gyp:events_base',
       ],
       'sources': [
         'test/wm_test_helper.cc',
         'test/wm_test_helper.h',
       ],
     },
     {
+      # GN version: //ui/wm:wm_unittests
       'target_name': 'wm_unittests',
       'type': 'executable',
       'dependencies': [
         '../../base/base.gyp:base',
         '../../base/base.gyp:test_support_base',
         '../../skia/skia.gyp:skia',
         '../../testing/gtest.gyp:gtest',
         '../aura/aura.gyp:aura',
         '../aura/aura.gyp:aura_test_support',
         '../base/ui_base.gyp:ui_base',
@@ skipping 17 matching lines @@
         'core/transient_window_manager_unittest.cc',
         'core/transient_window_stacking_client_unittest.cc',
         'core/user_activity_detector_unittest.cc',
         'core/visibility_controller_unittest.cc',
         'core/window_animations_unittest.cc',
         'core/window_util_unittest.cc',
       ],
     },
   ],
 }