Add SurfaceWillDraw notification

components/viz/frame_sinks/mojo_frame_sink_manager.cc

 // 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.
 
 #include "components/viz/frame_sinks/mojo_frame_sink_manager.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/memory/ptr_util.h"
@@ skipping 129 matching lines @@
     const cc::FrameSinkId& frame_sink_id,
     bool destroy_compositor_frame_sink) {
   DCHECK(thread_checker_.CalledOnValidThread());
   if (destroy_compositor_frame_sink)
     DestroyCompositorFrameSink(frame_sink_id);
   // TODO(fsamuel): Tell the frame sink manager host that the client connection
   // has been lost so that it can drop its private connection and allow a new
   // client instance to create a new CompositorFrameSink.
 }
 
+void OnSurfaceWillDraw(const cc::SurfaceId& surface_id) {}

[rjkroege, 2017/06/14 13:59:12]

why is this not in MojoFrameSinkManager::?

[Fady Samuel, 2017/06/14 15:15:25]

Yea, I'm kind of surprised this compiles?

[gklassen, 2017/06/14 15:16:35]

Done.

+
 void MojoFrameSinkManager::OnPrivateConnectionLost(
     const cc::FrameSinkId& frame_sink_id,
     bool destroy_compositor_frame_sink) {
   DCHECK(thread_checker_.CalledOnValidThread());
   if (destroy_compositor_frame_sink)
     DestroyCompositorFrameSink(frame_sink_id);
 }
 
 }  // namespace viz