Mac Overlays: Allow SolidColor and Tile quads to be candidates for overlays.

cc/output/overlay_strategy_single_on_top.cc

Index: cc/output/overlay_strategy_single_on_top.cc
diff --git a/cc/output/overlay_strategy_single_on_top.cc b/cc/output/overlay_strategy_single_on_top.cc
index ca254b2b8f31f402727c1b01927f8abc2afda803..dd0799b509b50915bde819d679b5b9b8f777d9ed 100644
--- a/cc/output/overlay_strategy_single_on_top.cc
+++ b/cc/output/overlay_strategy_single_on_top.cc
@@ -24,7 +24,8 @@ bool OverlayStrategySingleOnTop::Attempt(ResourceProvider* resource_provider,
   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) &&
+    if (capability_checker_->IsSupportedQuad(*it) &&
+        OverlayCandidate::FromDrawQuad(resource_provider, *it, &candidate) &&
         TryOverlay(quad_list, candidate_list, candidate, it)) {
       return true;
     }