cc: Fix overlay damage tracking bug

cc/output/overlay_strategy_sandwich.cc

Index: cc/output/overlay_strategy_sandwich.cc
diff --git a/cc/output/overlay_strategy_sandwich.cc b/cc/output/overlay_strategy_sandwich.cc
index 6aef45df36a3bbcaee485cbdf1527154d81944f1..ce590b9526220b28ee0dde118a406f409522a22d 100644
--- a/cc/output/overlay_strategy_sandwich.cc
+++ b/cc/output/overlay_strategy_sandwich.cc
@@ -42,8 +42,7 @@ OverlayStrategySandwich::~OverlayStrategySandwich() {}
 
 bool OverlayStrategySandwich::Attempt(ResourceProvider* resource_provider,
                                       RenderPassList* render_passes,
-                                      OverlayCandidateList* candidate_list,
-                                      gfx::Rect* damage_rect) {
+                                      OverlayCandidateList* candidate_list) {
   QuadList& quad_list = render_passes->back()->quad_list;
   for (auto it = quad_list.begin(); it != quad_list.end();) {
     OverlayCandidate candidate;