Refactor OverlayStrategySandwich and OverlayStrategyCommon

cc/output/overlay_processor.cc

Index: cc/output/overlay_processor.cc
diff --git a/cc/output/overlay_processor.cc b/cc/output/overlay_processor.cc
index ab334ec95344aef8d5d98a4cf14a50a001430a54..789fc13d7d076b7ec4db333646c7e10d21ff912e 100644
--- a/cc/output/overlay_processor.cc
+++ b/cc/output/overlay_processor.cc
@@ -25,15 +25,11 @@ void OverlayProcessor::Initialize() {
 
 OverlayProcessor::~OverlayProcessor() {}
 
-void OverlayProcessor::ProcessForOverlays(
-    RenderPassList* render_passes_in_draw_order,
-    OverlayCandidateList* candidate_list) {
-  for (StrategyList::iterator it = strategies_.begin(); it != strategies_.end();
-       ++it) {
-    if ((*it)->Attempt(render_passes_in_draw_order, candidate_list,
-                       surface_->device_scale_factor())) {
+void OverlayProcessor::ProcessForOverlays(RenderPassList* render_passes,
+                                          OverlayCandidateList* candidates) {
+  for (auto strategy : strategies_) {
+    if (strategy->Attempt(render_passes, candidates))
       return;
-    }
   }
 }