Changed EOverflowAnchor to an enum class and renamed its members

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

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights
  * reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@gmail.com>
@@ skipping 831 matching lines @@
   bool needsHorizontalScrollbar;
   bool needsVerticalScrollbar;
   computeScrollbarExistence(needsHorizontalScrollbar, needsVerticalScrollbar);
   setHasHorizontalScrollbar(needsHorizontalScrollbar);
   setHasVerticalScrollbar(needsVerticalScrollbar);
 }
 
 bool PaintLayerScrollableArea::shouldPerformScrollAnchoring() const {
   return RuntimeEnabledFeatures::scrollAnchoringEnabled() &&
          m_scrollAnchor.hasScroller() &&
-         layoutBox()->style()->overflowAnchor() != AnchorNone &&
+         layoutBox()->style()->overflowAnchor() != EOverflowAnchor::None &&
          !box().document().finishingOrIsPrinting();
 }
 
 FloatQuad PaintLayerScrollableArea::localToVisibleContentQuad(
     const FloatQuad& quad,
     const LayoutObject* localObject,
     MapCoordinatesFlags flags) const {
   LayoutBox* box = layoutBox();
   if (!box)
     return quad;
@@ skipping 1170 matching lines @@
 
 void PaintLayerScrollableArea::DelayScrollOffsetClampScope::
     clampScrollableAreas() {
   for (auto& scrollableArea : *s_needsClamp)
     scrollableArea->clampScrollOffsetAfterOverflowChange();
   delete s_needsClamp;
   s_needsClamp = nullptr;
 }
 
 }  // namespace blink