cc: De-special-case SurfaceLayer code

content/browser/renderer_host/delegated_frame_host.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 "content/browser/renderer_host/delegated_frame_host.h"
 
 #include <algorithm>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 449 matching lines @@
         support_->SubmitCompositorFrame(local_surface_id, std::move(frame));
     DCHECK(result);
 
     if (local_surface_id != local_surface_id_ || !has_frame_) {
       // manager must outlive compositors using it.
       cc::SurfaceId surface_id(frame_sink_id_, local_surface_id);
       cc::SurfaceInfo surface_info(surface_id, frame_device_scale_factor,
                                    frame_size);
       client_->DelegatedFrameHostGetLayer()->SetShowPrimarySurface(
           surface_info, manager->reference_factory());
+      client_->DelegatedFrameHostGetLayer()->SetFallbackSurface(surface_info);
       current_surface_size_ = frame_size;
       current_scale_factor_ = frame_device_scale_factor;
     }
 
     has_frame_ = true;
   }
   local_surface_id_ = local_surface_id;
 
   released_front_lock_ = NULL;
   current_frame_size_in_dip_ = frame_size_in_dip;
@@ skipping 386 matching lines @@
   }
 
   if (!skipped_frames_) {
     latest_confirmed_begin_frame_source_id_ = ack.source_id;
     latest_confirmed_begin_frame_sequence_number_ =
         ack.latest_confirmed_sequence_number;
   }
 }
 
 }  // namespace content