UMA stats for stylus usage

chrome/browser/ui/views/apps/chrome_native_app_window_views_aura_ash.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 "chrome/browser/ui/views/apps/chrome_native_app_window_views_aura_ash.h"
 
 #include "apps/ui/views/app_window_frame_view.h"
 #include "ash/aura/wm_window_aura.h"
 #include "ash/common/ash_constants.h"
 #include "ash/common/frame/custom_frame_view_ash.h"
 #include "ash/common/shell_window_ids.h"
 #include "ash/common/wm/window_state.h"
 #include "ash/common/wm/window_state_delegate.h"
 #include "ash/common/wm/window_state_observer.h"
 #include "ash/screen_util.h"
 #include "ash/shared/immersive_fullscreen_controller.h"
 #include "ash/shell.h"
 #include "ash/wm/panels/panel_frame_view.h"
 #include "ash/wm/window_properties.h"
 #include "ash/wm/window_state_aura.h"
 #include "chrome/browser/ui/ash/ash_util.h"
+#include "chrome/browser/ui/ash/metrics/stylus_metrics_recorder_chromeos.h"
 #include "chrome/browser/ui/ash/multi_user/multi_user_context_menu.h"
 #include "services/ui/public/cpp/property_type_converters.h"
 #include "services/ui/public/cpp/window.h"
 #include "services/ui/public/interfaces/window_manager.mojom.h"
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/mus/mus_util.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_observer.h"
 #include "ui/base/hit_test.h"
 #include "ui/base/models/simple_menu_model.h"
@@ skipping 93 matching lines @@
 
 void ChromeNativeAppWindowViewsAuraAsh::InitializeWindow(
     AppWindow* app_window,
     const AppWindow::CreateParams& create_params) {
   ChromeNativeAppWindowViewsAura::InitializeWindow(app_window, create_params);
   // Restore docked state on ash desktop.
   if (create_params.state == ui::SHOW_STATE_DOCKED) {
     widget()->GetNativeWindow()->SetProperty(aura::client::kShowStateKey,
                                              create_params.state);
   }
+  widget()->GetNativeWindow()->SetProperty(
+      chromeos::kStylusWindowTypeBucket,
+      chromeos::StylusWindowType::WINDOW_TYPE_APP);

[sky, 2016/09/16 23:20:17]

This is also used for panels, are you sure you want those lumped in with apps?

[xiaoyinh(OOO Sep 11-29), 2016/09/19 21:19:53]

Thanks for pointing this out. I've move it to
ChromeNativeAppWindowViews::InitializeDefaultWindow.

 }
 
 void ChromeNativeAppWindowViewsAuraAsh::OnBeforeWidgetInit(
     const AppWindow::CreateParams& create_params,
     views::Widget::InitParams* init_params,
     views::Widget* widget) {
   ChromeNativeAppWindowViewsAura::OnBeforeWidgetInit(create_params, init_params,
                                                      widget);
   if (create_params.is_ime_window) {
     // Puts ime windows into ime window container.
@@ skipping 204 matching lines @@
     GetMusWindow(widget()->GetNativeWindow())
         ->SetClientArea(insets, std::move(additional_client_regions));
   }
 }
 
 void ChromeNativeAppWindowViewsAuraAsh::OnMenuClosed() {
   menu_runner_.reset();
   menu_model_adapter_.reset();
   menu_model_.reset();
 }