Make ETextModify an enum class.

third_party/WebKit/Source/core/css/resolver/StyleAdjuster.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc.
  * All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
@@ skipping 119 matching lines @@
   return (element && element->IsInTopLayer()) ||
          style.StyleType() == kPseudoIdBackdrop;
 }
 
 static bool LayoutParentStyleForcesZIndexToCreateStackingContext(
     const ComputedStyle& layout_parent_style) {
   return layout_parent_style.IsDisplayFlexibleOrGridBox();
 }
 
 void StyleAdjuster::AdjustStyleForEditing(ComputedStyle& style) {
-  if (style.UserModify() != READ_WRITE_PLAINTEXT_ONLY)
+  if (style.UserModify() != EUserModify::kReadWritePlaintextOnly)
     return;
   // Collapsing whitespace is harmful in plain-text editing.
   if (style.WhiteSpace() == EWhiteSpace::kNormal)
     style.SetWhiteSpace(EWhiteSpace::kPreWrap);
   else if (style.WhiteSpace() == EWhiteSpace::kNowrap)
     style.SetWhiteSpace(EWhiteSpace::kPre);
   else if (style.WhiteSpace() == EWhiteSpace::kPreLine)
     style.SetWhiteSpace(EWhiteSpace::kPreWrap);
 }
 
@@ skipping 366 matching lines @@
   // must track to properly handle document lifecycle in some cases.
   //
   // It is possible that this node is already in a sticky subtree (i.e. we have
   // nested sticky nodes) - in that case the bit will already be set via
   // inheritance from the ancestor and there is no harm to setting it again.
   if (style.GetPosition() == EPosition::kSticky)
     style.SetSubtreeIsSticky(true);
 }
 
 }  // namespace blink