Correctly handle SurfaceDisplayOutputSurface::SwapBuffers with empty frame.

cc/surfaces/surface_display_output_surface.cc

 // Copyright 2014 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 "cc/surfaces/surface_display_output_surface.h"
 
 #include "cc/output/compositor_frame.h"
 #include "cc/output/compositor_frame_ack.h"
 #include "cc/surfaces/display.h"
 #include "cc/surfaces/onscreen_display_client.h"
@@ skipping 28 matching lines @@
 
 void SurfaceDisplayOutputSurface::ReceivedVSyncParameters(
     base::TimeTicks timebase,
     base::TimeDelta interval) {
   CommitVSyncParameters(timebase, interval);
 }
 
 void SurfaceDisplayOutputSurface::SwapBuffers(CompositorFrame* frame) {
   gfx::Size frame_size =
       frame->delegated_frame_data->render_pass_list.back()->output_rect.size();
-  if (frame_size != display_size_) {
+  if (frame_size.IsEmpty() || frame_size != display_size_) {
     if (!surface_id_.is_null()) {
       factory_.Destroy(surface_id_);
     }
     surface_id_ = allocator_->GenerateId();
     factory_.Create(surface_id_);
     display_size_ = frame_size;
   }
   display_client_->display()->SetSurfaceId(surface_id_,
                                            frame->metadata.device_scale_factor);
 
@@ skipping 32 matching lines @@
   if (client_)
     client_->ReclaimResources(&ack);
 }
 
 void SurfaceDisplayOutputSurface::SwapBuffersComplete(SurfaceDrawStatus drawn) {
   if (client_ && !display_client_->output_surface_lost())
     client_->DidSwapBuffersComplete();
 }
 
 }  // namespace cc