UMA stats for stylus usage

ash/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/features.gni")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 import("//ui/base/ui_features.gni")
 
 assert(use_aura)
@@ skipping 769 matching lines @@
     "wm/resize_shadow_controller.cc",
     "wm/resize_shadow_controller.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_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_wallpaper_controller.cc",
     "wm/system_wallpaper_controller.h",
     "wm/toplevel_window_event_handler.cc",
     "wm/toplevel_window_event_handler.h",
     "wm/video_detector.cc",
@@ skipping 135 matching lines @@
       "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",
     ]
   }
 
   # Usage of content should be in ash_content_unittests.
   assert_no_deps = [ "//content/*" ]
 }
 
 component("ash_with_content") {
   sources = [
     "content/ash_with_content_export.h",
@@ skipping 679 matching lines @@
   if (is_win) {
     configs -= [ "//build/config/win:console" ]
     configs += [ "//build/config/win:windowed" ]
     deps += [ "//sandbox" ]
   }
 
   if (is_chromeos) {
     deps += [ "//device/bluetooth" ]
   }
 }