UMA stats for stylus usage

chrome/browser/ui/ash/launcher/arc_app_window_launcher_controller.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/ash/launcher/arc_app_window_launcher_controller.h"
 
 #include <string>
 
 #include "ash/aura/wm_window_aura.h"
 #include "ash/common/shelf/shelf_delegate.h"
 #include "ash/common/wm/maximize_mode/maximize_mode_controller.h"
 #include "ash/common/wm/window_state.h"
 #include "ash/common/wm_lookup.h"
 #include "ash/common/wm_shell.h"
 #include "ash/common/wm_window_property.h"
 #include "ash/display/display_manager.h"
 #include "ash/display/screen_orientation_controller_chromeos.h"
+#include "ash/shared/app_types.h"
 #include "ash/shell.h"
 #include "ash/wm/window_state_aura.h"
 #include "ash/wm/window_util.h"
 #include "base/bind.h"
 #include "chrome/browser/chromeos/arc/arc_auth_service.h"
 #include "chrome/browser/chromeos/arc/arc_support_host.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/app_list/arc/arc_app_utils.h"
 #include "chrome/browser/ui/ash/launcher/arc_app_window_launcher_item_controller.h"
 #include "chrome/browser/ui/ash/launcher/chrome_launcher_controller.h"
@@ skipping 351 matching lines @@
   // the layout switch information.
   if (!observing_shell_) {
     observing_shell_ = true;
     ash::WmShell::Get()->AddShellObserver(this);
   }
 
   // Check if we have controller for this task.
   if (GetAppWindowForTask(task_id))
     return;
 
+  window->SetProperty(aura::client::kAppType,
+                      static_cast<int>(ash::AppType::ARC_APP));
+
   // Create controller if we have task info.
   TaskIdToShelfAppIdMap::iterator it = task_id_to_shelf_app_id_.find(task_id);
   if (it == task_id_to_shelf_app_id_.end())
     return;
 
   const std::string& app_id = it->second;
 
   views::Widget* widget = views::Widget::GetWidgetForNativeWindow(window);
   DCHECK(widget);
   std::unique_ptr<AppWindow> app_window(
@@ skipping 280 matching lines @@
   if (orientation_lock == arc::mojom::OrientationLock::CURRENT) {
     // Resolve the orientation when it first resolved.
     orientation_lock = GetCurrentOrientation();
     app_window->set_requested_orientation_lock(orientation_lock);
   }
 
   ash::Shell* shell = ash::Shell::GetInstance();
   shell->screen_orientation_controller()->LockOrientationForWindow(
       window, BlinkOrientationLockFromMojom(orientation_lock));
 }