mash: Port sysui's WallpaperDelegateMus to mojo:ash.

ash/mus/bridge/wm_shell_mus.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_MUS_BRIDGE_WM_SHELL_MUS_H_
 #define ASH_MUS_BRIDGE_WM_SHELL_MUS_H_
 
 #include <stdint.h>
 
+#include <map>
 #include <memory>
 #include <vector>
 
 #include "ash/common/wm_shell.h"
 #include "base/macros.h"
 #include "base/observer_list.h"
 #include "services/ui/public/cpp/window_tree_client_observer.h"
 
 namespace shell {
 class Connector;
@@ skipping 117 matching lines @@
 
   std::unique_ptr<AcceleratorControllerDelegateMus>
       accelerator_controller_delegate_;
   std::unique_ptr<AcceleratorControllerRegistrar>
       accelerator_controller_registrar_;
   std::unique_ptr<ImmersiveHandlerFactoryMus> immersive_handler_factory_;
   std::unique_ptr<SessionStateDelegate> session_state_delegate_;
 
   base::ObserverList<WmActivationObserver> activation_observers_;
 
+  // A cache of stub display info objects, used in absence of DisplayManager.
+  // TODO(mash): Get actual info from DisplayManager. http://crbug.com/622480.
+  mutable std::map<int64_t, display::ManagedDisplayInfo> display_info_map_;
+
   DISALLOW_COPY_AND_ASSIGN(WmShellMus);
 };
 
 }  // namespace mus
 }  // namespace ash
 
 #endif  // ASH_MUS_BRIDGE_WM_SHELL_MUS_H_