Implement aura::WindowPortMus::CreateCompositorFrameSink()

ui/aura/test/mus/test_window_tree.h

 // Copyright 2015 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_TEST_MUS_TEST_WINDOW_TREE_H_
 #define UI_AURA_TEST_MUS_TEST_WINDOW_TREE_H_
 
 #include <stdint.h>
 
 #include <vector>
@@ skipping 191 matching lines @@
       const SkBitmap& drag_image,
       const gfx::Vector2d& drag_image_offset,
       uint32_t drag_operation,
       ui::mojom::PointerKind source) override;
   void CancelDragDrop(uint32_t window_id) override;
   void PerformWindowMove(uint32_t change_id,
                          uint32_t window_id,
                          ui::mojom::MoveLoopSource source,
                          const gfx::Point& cursor_location) override;
   void CancelWindowMove(uint32_t window_id) override;
+  void GetFrameSinkId(uint32_t window_id) override;
 
   struct AckedEvent {
     uint32_t event_id;
     ui::mojom::EventResult result;
   };
   std::vector<AckedEvent> acked_events_;
   uint32_t window_id_ = 0u;
 
   base::Optional<std::vector<uint8_t>> last_property_value_;
 
@@ skipping 11 matching lines @@
   base::Optional<gfx::Rect> last_hit_test_mask_;
 
   base::Optional<cc::LocalSurfaceId> last_local_surface_id_;
 
   DISALLOW_COPY_AND_ASSIGN(TestWindowTree);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_TEST_MUS_TEST_WINDOW_TREE_H_