*** NOT FOR LANDING *** Unprefix multicol behind a flag

Source/core/animation/LengthStyleInterpolation.cpp

 // Copyright 2014 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 "config.h"
 #include "core/animation/LengthStyleInterpolation.h"
 
 #include "core/animation/css/CSSAnimatableValueFactory.h"
 #include "core/css/CSSCalculationValue.h"
 #include "core/css/resolver/StyleBuilder.h"
 #include "core/css/resolver/StyleResolverState.h"
 #include "platform/CalculationValue.h"
 
 namespace blink {
 
 namespace {
 
 bool pixelsForKeyword(CSSPropertyID property, CSSValueID valueID, double& result)
 {
     switch (property) {
     case CSSPropertyBorderBottomWidth:
     case CSSPropertyBorderLeftWidth:
     case CSSPropertyBorderRightWidth:
     case CSSPropertyBorderTopWidth:
-    case CSSPropertyWebkitColumnRuleWidth:
+    case CSSPropertyColumnRuleWidth:
     case CSSPropertyOutlineWidth:
         if (valueID == CSSValueThin) {
             result = 1;
             return true;
         }
         if (valueID == CSSValueMedium) {
             result = 3;
             return true;
         }
         if (valueID == CSSValueThick) {
@@ skipping 166 matching lines @@
     case CSSPropertyBorderTopWidth:
     case CSSPropertyFontSize:
     case CSSPropertyLetterSpacing:
     case CSSPropertyOutlineOffset:
     case CSSPropertyOutlineWidth:
     case CSSPropertyPerspective:
     case CSSPropertyStrokeWidth:
     case CSSPropertyVerticalAlign:
     case CSSPropertyWebkitBorderHorizontalSpacing:
     case CSSPropertyWebkitBorderVerticalSpacing:
-    case CSSPropertyWebkitColumnGap:
-    case CSSPropertyWebkitColumnRuleWidth:
-    case CSSPropertyWebkitColumnWidth:
+    case CSSPropertyColumnGap:
+    case CSSPropertyColumnRuleWidth:
+    case CSSPropertyColumnWidth:
     case CSSPropertyWebkitTransformOriginZ:
     case CSSPropertyWordSpacing:
         return nullptr;
     default:
         ASSERT_NOT_REACHED();
         return nullptr;
     }
 }
 
 namespace {
@@ skipping 101 matching lines @@
         StyleBuilder::applyProperty(m_id, state, fromInterpolableValue(*m_cachedValue, m_range).get());
     }
 }
 
 DEFINE_TRACE(LengthStyleInterpolation)
 {
     StyleInterpolation::trace(visitor);
 }
 
 }