Removes a couple more functions from WmWindow

ash/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_WM_WINDOW_H_
 #define ASH_WM_WINDOW_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 91 matching lines @@
   void Destroy();
 
   WmWindow* GetRootWindow() {
     return const_cast<WmWindow*>(
         const_cast<const WmWindow*>(this)->GetRootWindow());
   }
   const WmWindow* GetRootWindow() const;
   RootWindowController* GetRootWindowController();
 
   // See shell_window_ids.h for list of known ids.
-  void SetShellWindowId(int id);
-  int GetShellWindowId() const;
   WmWindow* GetChildByShellWindowId(int id);
 
   ui::wm::WindowType GetType() const;
   int GetAppType() const;
   void SetAppType(int app_type) const;
 
   ui::Layer* GetLayer();
 
   // TODO(sky): these are temporary until GetLayer() always returns non-null.
   bool GetLayerTargetVisibility();
@@ skipping 239 matching lines @@
 
   // If true the minimum size is 0x0, default is minimum size comes from widget.
   bool use_empty_minimum_size_for_testing_;
 
   DISALLOW_COPY_AND_ASSIGN(WmWindow);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_WINDOW_H_