Promotes remaining global window manager state into WindowManagerState

components/mus/ws/display_manager_delegate.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 COMPONENTS_MUS_WS_DISPLAY_MANAGER_DELEGATE_H_
 #define COMPONENTS_MUS_WS_DISPLAY_MANAGER_DELEGATE_H_
 
 #include "components/mus/public/interfaces/display.mojom.h"
 #include "components/mus/ws/user_id.h"
 
 namespace mus {
 namespace ws {
 
 class Display;
+class WindowManagerState;
 
 class DisplayManagerDelegate {
  public:
   virtual void OnFirstDisplayReady() = 0;
   virtual void OnNoMoreDisplays() = 0;
 
   // Gets the frame decorations for the specified user. Returns true if the
   // decorations have been set, false otherwise. |values| may be null.
   virtual bool GetFrameDecorationsForUser(
       const UserId& user_id,
       mojom::FrameDecorationValuesPtr* values) = 0;
 
+  virtual WindowManagerState* GetWindowManagerStateForUser(
+      const UserId& user_id) = 0;
+
  protected:
   virtual ~DisplayManagerDelegate() {}
 };
 
 }  // namespace ws
 }  // namespace mus
 
 #endif  // COMPONENTS_MUS_WS_DISPLAY_MANAGER_DELEGATE_H_