Implement aura::WindowPortMus::CreateCompositorFrameSink()

ui/aura/mus/window_tree_client.h

 // Copyright 2014 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 UI_AURA_MUS_WINDOW_TREE_CLIENT_H_
 #define UI_AURA_MUS_WINDOW_TREE_CLIENT_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 156 matching lines @@
   // Returns the current location of the mouse on screen. Note: this method may
   // race the asynchronous initialization; but in that case we return (0, 0).
   gfx::Point GetCursorScreenPoint();
 
   // See description in window_tree.mojom. When an existing pointer watcher is
   // updated or cleared then any future events from the server for that watcher
   // will be ignored.
   void StartPointerWatcher(bool want_moves);
   void StopPointerWatcher();
 
+  void GetFrameSinkId(Id window_id);
+
   void AddObserver(WindowTreeClientObserver* observer);
   void RemoveObserver(WindowTreeClientObserver* observer);
 
   void AddTestObserver(WindowTreeClientTestObserver* observer);
   void RemoveTestObserver(WindowTreeClientTestObserver* observer);
 
  private:
   friend class InFlightBoundsChange;
   friend class InFlightFocusChange;
   friend class InFlightPropertyChange;
@@ skipping 448 matching lines @@
   gfx::Insets normal_client_area_insets_;
 
   base::WeakPtrFactory<WindowTreeClient> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowTreeClient);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_MUS_WINDOW_TREE_CLIENT_H_