UMA stats for stylus usage

ash/common/wm_window.h

 // 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.
 
 #ifndef ASH_COMMON_WM_WINDOW_H_
 #define ASH_COMMON_WM_WINDOW_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 71 matching lines @@
 
   virtual void SetTitle(const base::string16& title) = 0;
   virtual base::string16 GetTitle() const = 0;
 
   // See shell_window_ids.h for list of known ids.
   virtual void SetShellWindowId(int id) = 0;
   virtual int GetShellWindowId() const = 0;
   virtual WmWindow* GetChildByShellWindowId(int id) = 0;
 
   virtual ui::wm::WindowType GetType() const = 0;
+  virtual int GetAppType() const = 0;
+  virtual void SetAppType(int app_type) const = 0;
 
   virtual bool IsBubble() = 0;
 
   // TODO(sky): seems like this shouldn't be exposed.
   virtual ui::Layer* GetLayer() = 0;
 
   virtual display::Display GetDisplayNearestWindow() = 0;
 
   virtual bool HasNonClientArea() = 0;
   virtual int GetNonClientComponent(const gfx::Point& location) = 0;
@@ skipping 220 matching lines @@
   virtual void AddLimitedPreTargetHandler(ui::EventHandler* handler) = 0;
   virtual void RemoveLimitedPreTargetHandler(ui::EventHandler* handler) = 0;
 
  protected:
   virtual ~WmWindow() {}
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_WM_WINDOW_H_