Makes ash/wm/common a library

ash/wm/common/wm_shell_window_ids.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 ASH_WM_COMMON_WM_SHELL_WINDOW_IDS_H_
 #define ASH_WM_COMMON_WM_SHELL_WINDOW_IDS_H_
 
-#include "ash/ash_export.h"
-
 // Defines the ids assigned to known containers. The id for a WmWindow is
 // accessed via GetShellWindowId().
 
 // TODO(sky): move this into wm namespace.
 namespace ash {
 
 // NOTE: while the value of these is not necessarily important, the ordering
 // is and is enforced in ash/shell_window_ids.h.
 
 // The container for standard top-level windows.
@@ skipping 14 matching lines @@
 // TODO(sky): this seems unnecessary. Perhaps it should be injected?
 // The container for the app list.
 const int kShellWindowId_AppListContainer = 12;
 
 // ID of the window created by PhantomWindowController or DragWindowController.
 const int kShellWindowId_PhantomWindow = 23;
 
 }  // namespace ash
 
 #endif  // ASH_WM_COMMON_WM_SHELL_WINDOW_IDS_H_