Enabling Aura-Mus clients to submit frames to Mus.

ui/aura/mus/window_port_mus.cc

Index: ui/aura/mus/window_port_mus.cc
diff --git a/ui/aura/mus/window_port_mus.cc b/ui/aura/mus/window_port_mus.cc
index ef8c087199fd8d8a59a1a60b3af642b7bd72fd56..d3862ac13a7205320930ddb3ae7b5dd46de84826 100644
--- a/ui/aura/mus/window_port_mus.cc
+++ b/ui/aura/mus/window_port_mus.cc
@@ -55,6 +55,32 @@ void WindowPortMus::SetPredefinedCursor(ui::mojom::Cursor cursor_id) {
   predefined_cursor_ = cursor_id;
 }
 
+std::unique_ptr<WindowCompositorFrameSink>
+WindowPortMus::RequestCompositorFrameSink(
+    ui::mojom::CompositorFrameSinkType type,
+    scoped_refptr<cc::ContextProvider> context_provider,
+    gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager) {
+  std::unique_ptr<WindowCompositorFrameSinkBinding>
+      compositor_frame_sink_binding;
+  std::unique_ptr<WindowCompositorFrameSink> compositor_frame_sink =
+      WindowCompositorFrameSink::Create(std::move(context_provider),
+                                        gpu_memory_buffer_manager,
+                                        &compositor_frame_sink_binding);
+  AttachCompositorFrameSink(type, std::move(compositor_frame_sink_binding));
+  return compositor_frame_sink;
+}
+
+void WindowPortMus::AttachCompositorFrameSink(
+    ui::mojom::CompositorFrameSinkType type,
+    std::unique_ptr<WindowCompositorFrameSinkBinding>
+        compositor_frame_sink_binding) {
+  window_tree_client_->AttachCompositorFrameSink(
+      server_id(), type,
+      std::move(compositor_frame_sink_binding->compositor_frame_sink_request_),
+      mojo::MakeProxy(std::move(
+          compositor_frame_sink_binding->compositor_frame_sink_client_)));
+}
+
 WindowPortMus::ServerChangeIdType WindowPortMus::ScheduleChange(
     const ServerChangeType type,
     const ServerChangeData& data) {