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

services/ui/ws/display_client_compositor_frame_sink.cc

 // Copyright 2017 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 "services/ui/ws/display_client_compositor_frame_sink.h"
 
 #include "base/threading/thread_checker.h"
 #include "cc/output/compositor_frame_sink_client.h"
 
 namespace ui {
@@ skipping 33 matching lines @@
 
 void DisplayClientCompositorFrameSink::SubmitCompositorFrame(
     cc::CompositorFrame frame) {
   DCHECK(thread_checker_->CalledOnValidThread());
   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();
+  gfx::Size frame_size = frame.render_pass_list.back()->output_rect.size();
 
   if (!local_surface_id_.is_valid() ||
       frame_size != last_submitted_frame_size_) {
     local_surface_id_ = id_allocator_.GenerateId();
     display_private_->ResizeDisplay(frame_size);
   }
   display_private_->SetLocalSurfaceId(local_surface_id_,
                                       frame.metadata.device_scale_factor);
   compositor_frame_sink_->SubmitCompositorFrame(local_surface_id_,
                                                 std::move(frame));
@@ skipping 31 matching lines @@
 
 void DisplayClientCompositorFrameSink::OnDidFinishFrame(
     const cc::BeginFrameAck& ack) {
   // If there was damage, the submitted CompositorFrame includes the ack.
   if (!ack.has_damage)
     compositor_frame_sink_->BeginFrameDidNotSwap(ack);
 }
 
 }  // namespace ws
 }  // namespace ui