Mandoline UI Process: Update namespaces and file names

components/mus/view_locator.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_VIEW_LOCATOR_H_
 #define COMPONENTS_MUS_VIEW_LOCATOR_H_
 
 namespace gfx {
 class Point;
 }
 
-namespace view_manager {
+namespace mus {
 
 class ServerView;
 
 // Finds the deepest visible view that contains the specified location.
 const ServerView* FindDeepestVisibleView(const ServerView* view,
                                          const gfx::Point& location);
 ServerView* FindDeepestVisibleView(ServerView* view,
                                    const gfx::Point& location);
 
-}  // namespace view_manager
+}  // namespace mus
 
 #endif  // COMPONENTS_MUS_VIEW_LOCATOR_H_