Refactor OverlayStrategySandwich and OverlayStrategyCommon

cc/output/overlay_processor.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_processor.h"
 
 #include "cc/output/output_surface.h"
 #include "cc/output/overlay_strategy_single_on_top.h"
 #include "cc/output/overlay_strategy_underlay.h"
 #include "ui/gfx/geometry/rect_conversions.h"
 #include "ui/gfx/transform.h"
 
 namespace cc {
 
 OverlayProcessor::OverlayProcessor(OutputSurface* surface) : surface_(surface) {
 }
 
 void OverlayProcessor::Initialize() {
   DCHECK(surface_);
   OverlayCandidateValidator* validator =
       surface_->GetOverlayCandidateValidator();
   if (validator)
     validator->GetStrategies(&strategies_);
 }
 
 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;
-    }
   }
 }
 
 }  // namespace cc