Split //ui/display and create //ui/display/manager.

ui/display/display_layout.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 UI_DISPLAY_MANAGER_DISPLAY_LAYOUT_H_
-#define UI_DISPLAY_MANAGER_DISPLAY_LAYOUT_H_
+#ifndef UI_DISPLAY_DISPLAY_LAYOUT_H_
+#define UI_DISPLAY_DISPLAY_LAYOUT_H_
 
 #include <stdint.h>
 
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/strings/string_piece.h"
 #include "ui/display/display_export.h"
@@ skipping 106 matching lines @@
   // Returns true if the display bounds were updated.
   static bool ApplyDisplayPlacement(const DisplayPlacement& placement,
                                     Displays* display_list,
                                     int minimum_offset_overlap);
 
   DISALLOW_COPY_AND_ASSIGN(DisplayLayout);
 };
 
 }  // namespace display
 
-#endif  // UI_DISPLAY_MANAGER_DISPLAY_LAYOUT_H_
+#endif  // UI_DISPLAY_DISPLAY_LAYOUT_H_