Revert "Adding the following 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 758 matching lines @@
       'wm/screen_dimmer.cc',
       'wm/screen_dimmer.h',
       '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/stylus_metrics_recorder.cc',
-      'wm/stylus_metrics_recorder.h',
       '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 397 matching lines @@
             'accelerators/magnifier_key_scroller.h',
             'accelerators/spoken_feedback_toggler.cc',
             'accelerators/spoken_feedback_toggler.h',
             'display/resolution_notification_controller.cc',
             'display/resolution_notification_controller.h',
             'touch/touch_transformer_controller.cc',
             'touch/touch_transformer_controller.h',
             'touch/touchscreen_util.cc',
             'touch/touchscreen_util.h',
             'virtual_keyboard_controller.cc',
-            'virtual_keyboard_controller.h',
-            'wm/stylus_metrics_recorder.cc',
-            'wm/stylus_metrics_recorder.h'
+            'virtual_keyboard_controller.h'
           ],
         }],
       ],
     },
     {
       # GN version: //ash:ash_with_content
       'target_name': 'ash_with_content',
       'type': '<(component)',
       'dependencies': [
         '../base/base.gyp:base',
@@ skipping 303 matching lines @@
                   '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
                 ],
               }
             ],
           ],
         },
       ],
     }],
   ],
 }