UMA stats for stylus usage

ash/mus/bridge/wm_window_mus.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/mus/bridge/wm_window_mus.h"
 
 #include "ash/common/shelf/shelf_item_types.h"
 #include "ash/common/wm/container_finder.h"
 #include "ash/common/wm/window_positioning_utils.h"
 #include "ash/common/wm/window_state.h"
@@ skipping 202 matching lines @@
 }
 
 ui::wm::WindowType WmWindowMus::GetType() const {
   // If the WindowType was expicitly set, then it means |window_| was created
   // by way of WmShellMus::NewWindow() and the type is locally defined. For
   // windows created in other ways, say from the client, then we need to get
   // the type from |window_| directly.
   return is_wm_window_type_set_ ? wm_window_type_ : GetWmWindowType(window_);
 }
 
+int WmWindowMus::GetAppType() const {
+  // TODO: Need support for window property kAppType: http://crbug.com/651206.
+  NOTIMPLEMENTED();
+  return 0;
+}
+
+void WmWindowMus::SetAppType(int app_type) const {
+  // TODO: Need support for window property kAppType: http://crbug.com/651206.
+  NOTIMPLEMENTED();
+}
+
 bool WmWindowMus::IsBubble() {
   return GetWindowType(window_) == ui::mojom::WindowType::BUBBLE;
 }
 
 ui::Layer* WmWindowMus::GetLayer() {
   // TODO(sky): this function should be nuked entirely.
   NOTIMPLEMENTED();
   return widget_ ? widget_->GetLayer() : nullptr;
 }
 
@@ skipping 734 matching lines @@
 }
 
 void WmWindowMus::OnTransientChildRemoved(ui::Window* window,
                                           ui::Window* transient) {
   FOR_EACH_OBSERVER(WmTransientWindowObserver, transient_observers_,
                     OnTransientChildRemoved(this, Get(transient)));
 }
 
 }  // namespace mus
 }  // namespace ash