Don't submit frames with no render passes in cc tests

services/ui/public/cpp/client_compositor_frame_sink.cc

Index: services/ui/public/cpp/client_compositor_frame_sink.cc
diff --git a/services/ui/public/cpp/client_compositor_frame_sink.cc b/services/ui/public/cpp/client_compositor_frame_sink.cc
index 8a132ae2dd89572e12ba9f82306416f6c6d4c1f4..ef014e05ae77d58a8dbc11cf528072e859106aa0 100644
--- a/services/ui/public/cpp/client_compositor_frame_sink.cc
+++ b/services/ui/public/cpp/client_compositor_frame_sink.cc
@@ -81,9 +81,7 @@ void ClientCompositorFrameSink::SubmitCompositorFrame(
   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();
+  gfx::Size frame_size = frame.render_pass_list.back()->output_rect.size();
   if (!enable_surface_synchronization_ &&
       (!local_surface_id_.is_valid() ||
        frame_size != last_submitted_frame_size_)) {