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

cc/surfaces/surface.cc

Index: cc/surfaces/surface.cc
diff --git a/cc/surfaces/surface.cc b/cc/surfaces/surface.cc
index 2ceae59329081c2295c5aadac3d04fb171d0742e..7902a9696ed2e08727d20cbf6c1e8233a5ded17c 100644
--- a/cc/surfaces/surface.cc
+++ b/cc/surfaces/surface.cc
@@ -84,8 +84,7 @@ void Surface::QueueFrame(CompositorFrame frame,
 
 void Surface::RequestCopyOfOutput(
     std::unique_ptr<CopyOutputRequest> copy_request) {
-  if (!active_frame_data_ ||
-      active_frame_data_->frame.render_pass_list.empty()) {
+  if (!active_frame_data_) {
     copy_request->SendEmptyResult();
     return;
   }
@@ -167,8 +166,7 @@ void Surface::ActivateFrame(FrameData frame_data) {
 
   // Save root pass copy requests.
   std::vector<std::unique_ptr<CopyOutputRequest>> old_copy_requests;
-  if (active_frame_data_ &&
-      !active_frame_data_->frame.render_pass_list.empty()) {
+  if (active_frame_data_) {
     std::swap(old_copy_requests,
               active_frame_data_->frame.render_pass_list.back()->copy_requests);
   }
@@ -184,10 +182,7 @@ void Surface::ActivateFrame(FrameData frame_data) {
   for (auto& copy_request : old_copy_requests)
     RequestCopyOfOutput(std::move(copy_request));
 
-  // Empty frames shouldn't be drawn and shouldn't contribute damage, so don't
-  // increment frame index for them.
-  if (!active_frame_data_->frame.render_pass_list.empty())
-    ++frame_index_;
+  ++frame_index_;
 
   previous_frame_surface_id_ = surface_id();