add stylus metrics

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 122 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",
     ]
   }
 
   if (!use_ozone) {
     sources -= [
       "wm/maximize_mode/scoped_disable_internal_mouse_and_keyboard_ozone.cc",
       "wm/maximize_mode/scoped_disable_internal_mouse_and_keyboard_ozone.h",
     ]
   }
 }
@@ skipping 335 matching lines @@
     configs += [ "//build/config/win:windowed" ]
     deps += [ "//sandbox" ]
   }
 
   if (is_chromeos) {
     deps += [ "//device/bluetooth" ]
   }
 }
 # When adding support for isolates, please have a look at run-time dependencies
 # in the ash_unittests_run target in ash.gyp.