Implement aura::WindowPortMus::CreateCompositorFrameSink()

ui/aura/mus/window_port_mus.h

Index: ui/aura/mus/window_port_mus.h
diff --git a/ui/aura/mus/window_port_mus.h b/ui/aura/mus/window_port_mus.h
index b7a933bf1d1cf27e7d975b1e6eb4d83e899d9f0f..fc6f477aa9ddfb32a840ab15270febc037b26172 100644
--- a/ui/aura/mus/window_port_mus.h
+++ b/ui/aura/mus/window_port_mus.h
@@ -12,7 +12,9 @@
 
 #include "base/logging.h"
 #include "base/macros.h"
+#include "base/memory/weak_ptr.h"
 #include "cc/surfaces/surface_info.h"
+#include "cc/surfaces/surface_reference_factory.h"
 #include "services/ui/public/cpp/client_compositor_frame_sink.h"
 #include "services/ui/public/interfaces/cursor/cursor.mojom.h"
 #include "services/ui/public/interfaces/window_tree.mojom.h"
@@ -270,6 +272,9 @@ class AURA_EXPORT WindowPortMus : public WindowPort, public WindowMus {
   void UpdatePrimarySurfaceInfo();
   void UpdateClientSurfaceEmbedder();
 
+  void OnSurfaceChanged(const cc::SurfaceId& surface_id,
+                        const gfx::Size& surface_size);
+
   WindowTreeClient* window_tree_client_;
 
   Window* window_ = nullptr;
@@ -292,6 +297,10 @@ class AURA_EXPORT WindowPortMus : public WindowPort, public WindowMus {
 
   ui::CursorData cursor_;
 
+  scoped_refptr<cc::SurfaceReferenceFactory> ref_factory_;
+
+  base::WeakPtrFactory<WindowPortMus> weak_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(WindowPortMus);
 };