Random wm frame painting fixes

components/mus/public/cpp/window.h

 // Copyright 2014 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 COMPONENTS_MUS_PUBLIC_CPP_WINDOW_H_
 #define COMPONENTS_MUS_PUBLIC_CPP_WINDOW_H_
 
 #include <stdint.h>
 #include <vector>
 
@@ skipping 154 matching lines @@
 
   void AddChild(Window* child);
   void RemoveChild(Window* child);
   const Children& children() const { return children_; }
 
   void Reorder(Window* relative, mojom::OrderDirection direction);
   void MoveToFront();
   void MoveToBack();
 
   // Returns true if |child| is this or a descendant of this.
-  bool Contains(Window* child) const;
+  bool Contains(const Window* child) const;
 
   void AddTransientWindow(Window* transient_window);
   void RemoveTransientWindow(Window* transient_window);
 
   // TODO(fsamuel): Figure out if we want to refactor transient window
   // management into a separate class.
   // Transient tree.
   Window* transient_parent() { return transient_parent_; }
   const Window* transient_parent() const { return transient_parent_; }
   const Children& transient_children() const { return transient_children_; }
@@ skipping 145 matching lines @@
   };
 
   std::map<const void*, Value> prop_map_;
 
   DISALLOW_COPY_AND_ASSIGN(Window);
 };
 
 }  // namespace mus
 
 #endif  // COMPONENTS_MUS_PUBLIC_CPP_WINDOW_H_