Makes mus not bring window to front on activation changes

services/ui/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 SERVICES_UI_PUBLIC_CPP_WINDOW_H_
 #define SERVICES_UI_PUBLIC_CPP_WINDOW_H_
 
 #include <stdint.h>
 #include <vector>
 
@@ skipping 314 matching lines @@
   void NotifyWindowVisibilityChangedUp(Window* target);
 
   // Returns true if embed is allowed for this node. If embedding is allowed all
   // the children are removed.
   bool PrepareForEmbed();
 
   void RemoveTransientWindowImpl(Window* child);
   static void ReorderWithoutNotification(Window* window,
                                          Window* relative,
                                          mojom::OrderDirection direction);
+  // Returns true if the order actually changed.
   static bool ReorderImpl(Window* window,
                           Window* relative,
                           mojom::OrderDirection direction,
                           OrderChangedNotifier* notifier);
 
   // Returns a pointer to the stacking target that can be used by
   // RestackTransientDescendants.
   static Window** GetStackingTarget(Window* window);
 
   WindowTreeClient* client_;
@@ skipping 46 matching lines @@
   };
 
   std::map<const void*, Value> prop_map_;
 
   DISALLOW_COPY_AND_ASSIGN(Window);
 };
 
 }  // namespace ui
 
 #endif  // SERVICES_UI_PUBLIC_CPP_WINDOW_H_