Convert Settings::rootLayerScrolls to RuntimeEnabledFeatures

third_party/WebKit/Source/core/paint/PaintInvalidator.cpp

 // Copyright 2016 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 "core/paint/PaintInvalidator.h"
 
 #include "core/editing/FrameSelection.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/Settings.h"
@@ skipping 160 matching lines @@
 }
 
 void PaintInvalidator::invalidatePaintIfNeeded(FrameView& frameView, PaintInvalidatorContext& context)
 {
     LayoutView* layoutView = frameView.layoutView();
     CHECK(layoutView);
 
     context.paintInvalidationContainer = context.paintInvalidationContainerForStackedContents = &layoutView->containerForPaintInvalidation();
     context.paintingLayer = layoutView->layer();
 
-    if (!frameView.frame().settings() || !frameView.frame().settings()->rootLayerScrolls())
+    if (!RuntimeEnabledFeatures::rootLayerScrollingEnabled())
         frameView.invalidatePaintOfScrollControlsIfNeeded(context);
 
     if (frameView.frame().selection().isCaretBoundsDirty())
         frameView.frame().selection().invalidateCaretRect();
 
     // Temporary callback for crbug.com/487345,402044
     // TODO(ojan): Make this more general to be used by PositionObserver
     // and rAF throttling.
     IntRect visibleRect = frameView.rootFrameToContents(frameView.computeVisibleArea());
     layoutView->sendMediaPositionChangeNotifications(visibleRect);
@@ skipping 40 matching lines @@
     object.getMutableForPainting().clearPaintInvalidationFlags();
 }
 
 void PaintInvalidator::processPendingDelayedPaintInvalidations()
 {
     for (auto target : m_pendingDelayedPaintInvalidations)
         target->getMutableForPainting().setShouldDoFullPaintInvalidation(PaintInvalidationDelayedFull);
 }
 
 } // namespace blink