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

cc/surfaces/compositor_frame_sink_support.cc

Index: cc/surfaces/compositor_frame_sink_support.cc
diff --git a/cc/surfaces/compositor_frame_sink_support.cc b/cc/surfaces/compositor_frame_sink_support.cc
index 09bfdbc7b58f43b145eb1ca74e1823e2eb3fe196..6caf493754918b7ea52103bd180276675d8f6c8b 100644
--- a/cc/surfaces/compositor_frame_sink_support.cc
+++ b/cc/surfaces/compositor_frame_sink_support.cc
@@ -120,10 +120,11 @@ void CompositorFrameSinkSupport::SubmitCompositorFrame(
     const LocalSurfaceId& local_surface_id,
     CompositorFrame frame) {
   DCHECK(surface_factory_);
-  ++ack_pending_count_;
-
   DCHECK_GE(frame.metadata.begin_frame_ack.sequence_number,
             BeginFrameArgs::kStartingFrameNumber);
+  DCHECK(!frame.render_pass_list.empty());
+
+  ++ack_pending_count_;
 
   // |has_damage| is not transmitted.
   frame.metadata.begin_frame_ack.has_damage = true;