Moves RootWindowControllerCommon and LayoutManager to common

ash/wm/drag_window_controller.cc

 // Copyright (c) 2012 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.
 
 #include "ash/wm/drag_window_controller.h"
 
 #include <algorithm>
 
+#include "ash/common/shell_window_ids.h"
 #include "ash/display/window_tree_host_manager.h"
 #include "ash/screen_util.h"
 #include "ash/shell.h"
-#include "ash/shell_window_ids.h"
 #include "ash/wm/window_util.h"
 #include "base/memory/ptr_util.h"
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/client/screen_position_client.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_delegate.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/base/hit_test.h"
 #include "ui/compositor/layer.h"
 #include "ui/compositor/layer_tree_owner.h"
@@ skipping 288 matching lines @@
       layers.pop_back();
       if (layer->delegate())
         layer->delegate()->OnPaintLayer(context);
       for (auto* child : layer->children())
         layers.push_back(child);
     }
   }
 }
 
 }  // namespace ash