[cc] Fix CompositorFrameSinkSupport BeginFrameAck interface.

content/browser/renderer_host/offscreen_canvas_compositor_frame_sink.cc

 // Copyright 2016 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 "content/browser/renderer_host/offscreen_canvas_compositor_frame_sink.h"
 
 #include "base/memory/ptr_util.h"
 #include "cc/surfaces/surface.h"
 #include "cc/surfaces/surface_manager.h"
 #include "content/browser/renderer_host/offscreen_canvas_compositor_frame_sink_provider_impl.h"
@@ skipping 30 matching lines @@
 }
 
 void OffscreenCanvasCompositorFrameSink::SubmitCompositorFrame(
     const cc::LocalSurfaceId& local_surface_id,
     cc::CompositorFrame frame) {
   // TODO(samans): This will need to do something similar to
   // GpuCompositorFrameSink.
   support_.SubmitCompositorFrame(local_surface_id, std::move(frame));
 }
 
+void OffscreenCanvasCompositorFrameSink::BeginFrameDidNotSwap(
+    const cc::BeginFrameAck& begin_frame_ack) {
+  support_.BeginFrameDidNotSwap(begin_frame_ack);
+}
+
 void OffscreenCanvasCompositorFrameSink::EvictFrame() {
   support_.EvictFrame();
 }
 
 void OffscreenCanvasCompositorFrameSink::DidReceiveCompositorFrameAck() {
   if (client_)
     client_->DidReceiveCompositorFrameAck();
 }
 
 void OffscreenCanvasCompositorFrameSink::OnBeginFrame(
@@ skipping 14 matching lines @@
   if (client_)
     client_->WillDrawSurface(local_surface_id, damage_rect);
 }
 
 void OffscreenCanvasCompositorFrameSink::OnClientConnectionLost() {
   provider_->OnCompositorFrameSinkClientConnectionLost(
       support_.frame_sink_id());
 }
 
 }  // namespace content