Add DCLayerOverlayProcessor and supporting DCLayer structures.

components/display_compositor/compositor_overlay_candidate_validator_ozone.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 "components/display_compositor/compositor_overlay_candidate_validator_ozone.h"
 
 #include <stddef.h>
 
 #include <utility>
 
@@ skipping 72 matching lines @@
 void CompositorOverlayCandidateValidatorOzone::GetStrategies(
     cc::OverlayProcessor::StrategyList* strategies) {
   for (auto& instantiator : strategies_instantiators_)
     strategies->push_back(instantiator.Run(this));
 }
 
 bool CompositorOverlayCandidateValidatorOzone::AllowCALayerOverlays() {
   return false;
 }
 
+bool CompositorOverlayCandidateValidatorOzone::AllowDCLayerOverlays() {
+  return false;
+}
+
 void CompositorOverlayCandidateValidatorOzone::CheckOverlaySupport(
     cc::OverlayCandidateList* surfaces) {
   // SW mirroring copies out of the framebuffer, so we can't remove any
   // quads for overlaying, otherwise the output is incorrect.
   if (software_mirror_active_) {
     for (size_t i = 0; i < surfaces->size(); i++) {
       surfaces->at(i).overlay_handled = false;
     }
     return;
   }
@@ skipping 24 matching lines @@
     surfaces->at(i).display_rect = ozone_surface_list.at(i).display_rect;
   }
 }
 
 void CompositorOverlayCandidateValidatorOzone::SetSoftwareMirrorMode(
     bool enabled) {
   software_mirror_active_ = enabled;
 }
 
 }  // namespace display_compositor