Convert Settings::rootLayerScrolls to RuntimeEnabledFeatures

third_party/WebKit/Source/core/layout/compositing/CompositedLayerMapping.cpp

 /*
  * Copyright (C) 2009, 2010, 2011 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 1555 matching lines @@
     int elementId = 0;
     uint32_t primaryMutableProperties = CompositorMutableProperty::kNone;
     uint32_t scrollMutableProperties = CompositorMutableProperty::kNone;
 
     Node* owningNode = m_owningLayer.layoutObject()->node();
     Element* animatingElement = nullptr;
     const ComputedStyle* animatingStyle = nullptr;
     if (owningNode) {
         Document& document = owningNode->document();
         Element* scrollingElement = document.scrollingElement();
-        LocalFrame* frame = document.frame();
-        Settings* settings = frame ? frame->settings() : nullptr;
-        bool rootLayerScrolls = settings && settings->rootLayerScrolls();
-        if (owningNode->isElementNode() && (!rootLayerScrolls || owningNode != scrollingElement)) {
+        if (owningNode->isElementNode() && (!RuntimeEnabledFeatures::rootLayerScrollingEnabled() || owningNode != scrollingElement)) {
             animatingElement = toElement(owningNode);
             animatingStyle = m_owningLayer.layoutObject()->style();
-        } else if (owningNode->isDocumentNode() && rootLayerScrolls) {
+        } else if (owningNode->isDocumentNode() && RuntimeEnabledFeatures::rootLayerScrollingEnabled()) {
             owningNode = animatingElement = scrollingElement;
             if (scrollingElement)
                 animatingStyle = scrollingElement->layoutObject()->style();
         }
     }
 
     if (RuntimeEnabledFeatures::compositorWorkerEnabled() && animatingElement && animatingStyle->hasCompositorProxy()) {
         uint32_t compositorMutableProperties = animatingElement->compositorMutableProperties();
         elementId = DOMNodeIds::idForNode(owningNode);
         primaryMutableProperties = (CompositorMutableProperty::kOpacity | CompositorMutableProperty::kTransform) & compositorMutableProperties;
@@ skipping 1118 matching lines @@
     } else if (graphicsLayer == m_scrollingContentsLayer.get()) {
         name = "Scrolling Contents Layer";
     } else {
         ASSERT_NOT_REACHED();
     }
 
     return name;
 }
 
 } // namespace blink