Index: services/ui/ws/display_client_compositor_frame_sink.cc |
diff --git a/services/ui/ws/display_client_compositor_frame_sink.cc b/services/ui/ws/display_client_compositor_frame_sink.cc |
index 5d719fa1dab4290c2bcdd7c33ffca4ff8adfccf4..73de926801817e8807a400e623e2674949c1fb6c 100644 |
--- a/services/ui/ws/display_client_compositor_frame_sink.cc |
+++ b/services/ui/ws/display_client_compositor_frame_sink.cc |
@@ -48,6 +48,9 @@ void DisplayClientCompositorFrameSink::SubmitCompositorFrame( |
if (!compositor_frame_sink_) |
return; |
+ DCHECK_LE(cc::BeginFrameArgs::kStartingFrameNumber, |
+ frame.metadata.begin_frame_ack.sequence_number); |
+ |
gfx::Size frame_size = last_submitted_frame_size_; |
if (!frame.render_pass_list.empty()) |
frame_size = frame.render_pass_list.back()->output_rect.size(); |