UMA stats for stylus usage

ash/aura/wm_window_aura.cc

 // Copyright 2016 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.
 
 #include "ash/aura/wm_window_aura.h"
 
 #include "ash/aura/aura_layout_manager_adapter.h"
 #include "ash/aura/wm_root_window_controller_aura.h"
 #include "ash/aura/wm_shell_aura.h"
 #include "ash/common/ash_constants.h"
@@ skipping 170 matching lines @@
 }
 
 int WmWindowAura::GetShellWindowId() const {
   return window_->id();
 }
 
 ui::wm::WindowType WmWindowAura::GetType() const {
   return window_->type();
 }
 
+int WmWindowAura::GetAppType() const {
+  return window_->GetProperty(aura::client::kAppType);
+}
+
+void WmWindowAura::SetAppType(int app_type) const {
+  window_->SetProperty(aura::client::kAppType, app_type);
+}
+
 bool WmWindowAura::IsBubble() {
   views::Widget* widget = views::Widget::GetWidgetForNativeView(window_);
   return widget->widget_delegate()->AsBubbleDialogDelegate() != nullptr;
 }
 
 ui::Layer* WmWindowAura::GetLayer() {
   return window_->layer();
 }
 
 display::Display WmWindowAura::GetDisplayNearestWindow() {
@@ skipping 683 matching lines @@
                     OnTransientChildAdded(this, Get(transient)));
 }
 
 void WmWindowAura::OnTransientChildRemoved(aura::Window* window,
                                            aura::Window* transient) {
   FOR_EACH_OBSERVER(WmTransientWindowObserver, transient_observers_,
                     OnTransientChildRemoved(this, Get(transient)));
 }
 
 }  // namespace ash