add stylus metrics

ash/ash.gyp

 # Copyright (c) 2012 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,
     # These files lists are shared with the GN build.
     'ash_sources': [
       'accelerators/accelerator_commands_aura.cc',
@@ skipping 754 matching lines @@
       'wm/screen_pinning_controller.cc',
       'wm/screen_pinning_controller.h',
       'wm/session_state_animator.cc',
       'wm/session_state_animator.h',
       'wm/session_state_animator_impl.cc',
       'wm/session_state_animator_impl.h',
       'wm/stacking_controller.cc',
       'wm/stacking_controller.h',
       'wm/status_area_layout_manager.cc',
       'wm/status_area_layout_manager.h',
+      'wm/stylus_metrics_recorder.cc',
+      'wm/stylus_metrics_recorder.h',

[oshima, 2016/08/23 21:40:57]

if these are for cros, please exclude them on other platforms

[xiaoyinh(OOO Sep 11-29), 2016/08/23 22:43:01]

Done.

       'wm/system_background_controller.cc',
       'wm/system_background_controller.h',
       'wm/system_gesture_event_filter.cc',
       'wm/system_gesture_event_filter.h',
       'wm/system_modal_container_event_filter.cc',
       'wm/system_modal_container_event_filter.h',
       'wm/system_modal_container_event_filter_delegate.h',
       'wm/system_modal_container_layout_manager.cc',
       'wm/system_modal_container_layout_manager.h',
       'wm/toplevel_window_event_handler.cc',
@@ skipping 721 matching lines @@
                   '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
                 ],
               }
             ],
           ],
         },
       ],
     }],
   ],
 }