Moves common code in ash/wm/overview to ash/common/wm/overview

ash/common/wm/overview/window_grid.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 ASH_WM_OVERVIEW_WINDOW_GRID_H_
-#define ASH_WM_OVERVIEW_WINDOW_GRID_H_
+#ifndef ASH_COMMON_WM_OVERVIEW_WINDOW_GRID_H_
+#define ASH_COMMON_WM_OVERVIEW_WINDOW_GRID_H_
 
 #include <stddef.h>
 
 #include <memory>
 #include <set>
 #include <vector>
 
+#include "ash/common/wm/overview/window_selector.h"
 #include "ash/common/wm_window_observer.h"
-#include "ash/wm/overview/window_selector.h"
 #include "base/macros.h"
 #include "base/memory/scoped_vector.h"
 
 namespace views {
 class Widget;
 }
 
 namespace ash {
 
 class WindowSelectorItem;
@@ skipping 147 matching lines @@
   size_t selected_index_;
 
   // Number of columns in the grid.
   size_t num_columns_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowGrid);
 };
 
 }  // namespace ash
 
-#endif  // ASH_WM_OVERVIEW_WINDOW_GRID_H_
+#endif  // ASH_COMMON_WM_OVERVIEW_WINDOW_GRID_H_