WIP: Surface Synchronization System

content/browser/compositor/mus_browser_compositor_output_surface.cc

Index: content/browser/compositor/mus_browser_compositor_output_surface.cc
diff --git a/content/browser/compositor/mus_browser_compositor_output_surface.cc b/content/browser/compositor/mus_browser_compositor_output_surface.cc
index 6966482426df76d472a569269b31da836c69cc76..7288ac8e081252775763e41f91cd113a111fd6a7 100644
--- a/content/browser/compositor/mus_browser_compositor_output_surface.cc
+++ b/content/browser/compositor/mus_browser_compositor_output_surface.cc
@@ -36,6 +36,9 @@ MusBrowserCompositorOutputSurface::MusBrowserCompositorOutputSurface(
       window_(window),
       begin_frame_source_(nullptr) {
   aura::WindowPortMus* window_port = aura::WindowPortMus::Get(window_);
+  cc::FrameSinkId frame_sink_id(window_port->server_id(), 0);
+  fprintf(stderr, ">>>>MusBrowserCompositorOutputSurface %s\n",
+          frame_sink_id.ToString().c_str());
   DCHECK(window_port);
   compositor_frame_sink_ = window_port->RequestCompositorFrameSink(
       context, gpu_memory_buffer_manager);