Revert of Mandoline UI Process: Update namespaces and file names

components/mus/server_view_drawn_tracker_observer.h

 // Copyright 2015 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_SERVER_VIEW_DRAWN_TRACKER_OBSERVER_H_
 #define COMPONENTS_MUS_SERVER_VIEW_DRAWN_TRACKER_OBSERVER_H_
 
-namespace mus {
+namespace view_manager {
 
 class ServerView;
 
 class ServerViewDrawnTrackerObserver {
  public:
   // Invoked when the drawn state changes. If |is_drawn| is false |ancestor|
   // identifies where the change occurred. In the case of a remove |ancestor| is
   // the parent of the view that was removed. In the case of a visibility change
   // |ancestor| is the parent of the view whose visibility changed.
   virtual void OnDrawnStateChanged(ServerView* ancestor,
                                    ServerView* view,
                                    bool is_drawn) {}
 
  protected:
   virtual ~ServerViewDrawnTrackerObserver() {}
 };
 
-}  // namespace mus
+}  // namespace view_manager
 
 #endif  // COMPONENTS_MUS_SERVER_VIEW_DRAWN_TRACKER_OBSERVER_H_