Avoid Copying damage rect when using Overlays

cc/output/overlay_strategy_underlay.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/output/overlay_strategy_underlay.h"
 
 #include "cc/output/overlay_candidate_validator.h"
 #include "cc/quads/draw_quad.h"
 #include "cc/quads/solid_color_draw_quad.h"
 
 namespace cc {
 
 OverlayStrategyUnderlay::OverlayStrategyUnderlay(
     OverlayCandidateValidator* capability_checker)
     : capability_checker_(capability_checker) {
   DCHECK(capability_checker);
 }
 
 OverlayStrategyUnderlay::~OverlayStrategyUnderlay() {}
 
 bool OverlayStrategyUnderlay::Attempt(ResourceProvider* resource_provider,
                                       RenderPassList* render_passes,
-                                      OverlayCandidateList* candidate_list) {
+                                      OverlayCandidateList* candidate_list,
+                                      gfx::Rect* damage_rect) {
   QuadList& quad_list = render_passes->back()->quad_list;
   for (auto it = quad_list.begin(); it != quad_list.end(); ++it) {
     OverlayCandidate candidate;
     if (!OverlayCandidate::FromDrawQuad(resource_provider, *it, &candidate))
       continue;
 
     // Add the overlay.
     OverlayCandidateList new_candidate_list = *candidate_list;
     new_candidate_list.push_back(candidate);
     new_candidate_list.back().plane_z_order = -1;
@@ skipping 12 matching lines @@
                           SK_ColorTRANSPARENT, true);
       candidate_list->swap(new_candidate_list);
       return true;
     }
   }
 
   return false;
 }
 
 }  // namespace cc