Removes most of aura dependencies from DefaultState

ash/wm/common/wm_globals.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_GLOBALS_H_
 #define ASH_WM_COMMON_WM_GLOBALS_H_
 
+#include <stdint.h>
+
 #include <vector>
 
 #include "ash/ash_export.h"
 
 namespace gfx {
 class Rect;
 }
 
 namespace ash {
 namespace wm {
 
 class WmWindow;
 
 // Used for accessing global state.
 class ASH_EXPORT WmGlobals {
  public:
   virtual ~WmGlobals() {}
 
   // This is necessary for a handful of places that is difficult to plumb
   // through context.
   static WmGlobals* Get();
 
   virtual WmWindow* GetActiveWindow() = 0;
 
+  // Returns the root window for the specified display.
+  virtual WmWindow* GetRootWindowForDisplayId(int64_t display_id) = 0;
+
   // Returns the root window that newly created windows should be added to.
   // NOTE: this returns the root, newly created window should be added to the
   // appropriate container in the returned window.
   virtual WmWindow* GetRootWindowForNewWindows() = 0;
 
   // returns the list of more recently used windows excluding modals.
   virtual std::vector<WmWindow*> GetMruWindowListIgnoreModals() = 0;
 
   // Returns true if the first window shown on first run should be
   // unconditionally maximized, overriding the heuristic that normally chooses
   // the window size.
   virtual bool IsForceMaximizeOnFirstRun() = 0;
 
   virtual std::vector<WmWindow*> GetAllRootWindows() = 0;
 };
 
 }  // namespace wm
 }  // namespace ash
 
 #endif  // ASH_WM_COMMON_WM_GLOBALS_H_