cc: Remove things from OutputSurface and CompositorFrameSink.

services/ui/public/cpp/compositor_frame_sink.cc

Index: services/ui/public/cpp/compositor_frame_sink.cc
diff --git a/services/ui/public/cpp/compositor_frame_sink.cc b/services/ui/public/cpp/compositor_frame_sink.cc
index 25c4e066ad7ecece6c45fe86f2a24c6abcd98750..017f70094e7391d65227549847d6618918789b1d 100644
--- a/services/ui/public/cpp/compositor_frame_sink.cc
+++ b/services/ui/public/cpp/compositor_frame_sink.cc
@@ -19,10 +19,8 @@ CompositorFrameSink::CompositorFrameSink(
     std::unique_ptr<ui::WindowSurface> surface)
     : cc::CompositorFrameSink(
           make_scoped_refptr(new ContextProvider(std::move(gpu_channel_host))),
-          nullptr,
           nullptr),
       surface_(std::move(surface)) {
-  capabilities_.delegated_rendering = true;
 }
 
 CompositorFrameSink::~CompositorFrameSink() {}
@@ -47,17 +45,6 @@ void CompositorFrameSink::DetachFromClient() {
   cc::CompositorFrameSink::DetachFromClient();
 }
 
-void CompositorFrameSink::BindFramebuffer() {
-  // This is a delegating output surface, no framebuffer/direct drawing support.
-  NOTREACHED();
-}
-
-uint32_t CompositorFrameSink::GetFramebufferCopyTextureFormat() {
-  // This is a delegating output surface, no framebuffer/direct drawing support.
-  NOTREACHED();
-  return 0;
-}
-
 void CompositorFrameSink::SwapBuffers(cc::CompositorFrame frame) {
   // CompositorFrameSink owns WindowSurface, and so if CompositorFrameSink is
   // destroyed then SubmitCompositorFrame's callback will never get called.