Convert Settings::rootLayerScrolls to RuntimeEnabledFeatures

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

 /*
  * Copyright (C) 2009, 2010 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 389 matching lines @@
 
         if (layersChanged) {
             updateType = std::max(updateType, CompositingUpdateRebuildTree);
             if (ScrollingCoordinator* scrollingCoordinator = this->scrollingCoordinator())
                 scrollingCoordinator->notifyGeometryChanged();
         }
     }
 
     if (updateType != CompositingUpdateNone) {
         if (RuntimeEnabledFeatures::compositorWorkerEnabled() && m_scrollLayer) {
-            LocalFrame* frame = m_layoutView.document().frame();
-            Settings* settings = frame ? frame->settings() : nullptr;
             // If rootLayerScrolls is enabled, these properties are applied in
             // CompositedLayerMapping::updateElementIdAndCompositorMutableProperties.
-            if (!settings || !settings->rootLayerScrolls()) {
+            if (!RuntimeEnabledFeatures::rootLayerScrollingEnabled()) {
                 if (Element* scrollingElement = m_layoutView.document().scrollingElement()) {
                     uint32_t mutableProperties = CompositorMutableProperty::kNone;
                     if (scrollingElement->hasCompositorProxy())
                         mutableProperties = (CompositorMutableProperty::kScrollLeft | CompositorMutableProperty::kScrollTop) & scrollingElement->compositorMutableProperties();
                     m_scrollLayer->setCompositorMutableProperties(mutableProperties);
                 }
             }
         }
 
         GraphicsLayerUpdater updater;
@@ skipping 588 matching lines @@
 
     m_layoutView.frameView()->positionScrollbarLayers();
 }
 
 void PaintLayerCompositor::ensureRootLayer()
 {
     RootLayerAttachment expectedAttachment = m_layoutView.frame()->isLocalRoot() ? RootLayerAttachedViaChromeClient : RootLayerAttachedViaEnclosingFrame;
     if (expectedAttachment == m_rootLayerAttachment)
         return;
 
-    Settings* settings = m_layoutView.document().settings();
     if (!m_rootContentLayer) {
         m_rootContentLayer = GraphicsLayer::create(this);
         IntRect overflowRect = m_layoutView.pixelSnappedLayoutOverflowRect();
         m_rootContentLayer->setSize(FloatSize(overflowRect.maxX(), overflowRect.maxY()));
         m_rootContentLayer->setPosition(FloatPoint());
         m_rootContentLayer->setOwnerNodeId(DOMNodeIds::idForNode(m_layoutView.node()));
 
         // FIXME: with rootLayerScrolls, we probably don't even need m_rootContentLayer?
-        if (!(settings && settings->rootLayerScrolls())) {
+        if (!RuntimeEnabledFeatures::rootLayerScrollingEnabled()) {
             // Need to clip to prevent transformed content showing outside this frame
             m_rootContentLayer->setMasksToBounds(true);
         }
     }
 
     if (!m_overflowControlsHostLayer) {
         ASSERT(!m_scrollLayer);
         ASSERT(!m_containerLayer);
 
         // Create a layer to host the clipping layer and the overflow controls layers.
@@ skipping 201 matching lines @@
     } else if (graphicsLayer == m_scrollLayer.get()) {
         name = "Frame Scrolling Layer";
     } else {
         ASSERT_NOT_REACHED();
     }
 
     return name;
 }
 
 } // namespace blink