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

Source/core/css/CSSProperties.in

Index: Source/core/css/CSSProperties.in
diff --git a/Source/core/css/CSSProperties.in b/Source/core/css/CSSProperties.in
index 384bdf5b2602c87e02551ec3b1f711c505ac67fc..7f30588e7833ca69c2c6655025fcb593f9e4d5fd 100644
--- a/Source/core/css/CSSProperties.in
+++ b/Source/core/css/CSSProperties.in
@@ -159,7 +159,14 @@ clip-rule inherited, svg, type_name=WindRule
 color-interpolation inherited, svg
 color-interpolation-filters inherited, svg, type_name=EColorInterpolation
 color-rendering inherited, svg
-column-fill runtime_flag=RegionBasedColumns, type_name=ColumnFill
+column-count animatable, type_name=unsigned short, custom_all
+column-fill runtime_flag=UnprefixMulticol, type_name=ColumnFill
+column-gap animatable, converter=convertComputedLength<float>, custom_all
+column-rule-color animatable, custom_all
+column-rule-style type_name=EBorderStyle, initial=initialBorderStyle
+column-rule-width animatable, converter=convertLineWidth<unsigned short>
+column-span type_name=ColumnSpan
+column-width animatable, converter=convertComputedLength<float>, custom_all
 content custom_all
 counter-increment custom_all
 counter-reset custom_all
@@ -325,13 +332,6 @@ y animatable, svg, converter=convertLength
 -webkit-column-break-after type_name=EPageBreak, initial=initialPageBreak
 -webkit-column-break-before type_name=EPageBreak, initial=initialPageBreak
 -webkit-column-break-inside type_name=EPageBreak, initial=initialPageBreak
--webkit-column-count animatable, type_name=unsigned short, custom_all
--webkit-column-gap animatable, converter=convertComputedLength<float>, custom_all
--webkit-column-rule-color animatable, custom_all
--webkit-column-rule-style type_name=EBorderStyle, initial=initialBorderStyle
--webkit-column-rule-width animatable, converter=convertLineWidth<unsigned short>
--webkit-column-span type_name=ColumnSpan
--webkit-column-width animatable, converter=convertComputedLength<float>, custom_all
 -webkit-filter animatable, custom_value
 -webkit-highlight inherited, converter=convertString<CSSValueNone>
 -webkit-hyphenate-character inherited, name_for_methods=HyphenationString, converter=convertString<CSSValueAuto>
@@ -448,6 +448,8 @@ border-spacing longhands=-webkit-border-horizontal-spacing;-webkit-border-vertic
 border-style longhands=border-top-style;border-right-style;border-bottom-style;border-left-style
 border-top longhands=border-top-width;border-top-style;border-top-color
 border-width longhands=border-top-width;border-right-width;border-bottom-width;border-left-width
+column-rule longhands=column-rule-width;column-rule-style;column-rule-color
+columns longhands=column-width;column-count
 flex longhands=flex-grow;flex-shrink;flex-basis
 flex-flow longhands=flex-direction;flex-wrap
 font longhands=font-family;font-size;font-style;font-variant;font-weight;font-stretch;line-height
@@ -468,8 +470,6 @@ transition longhands=transition-property;transition-duration;transition-timing-f
 -webkit-border-before longhands=-webkit-border-before-width;-webkit-border-before-style;-webkit-border-before-color
 -webkit-border-end longhands=-webkit-border-end-width;-webkit-border-end-style;-webkit-border-end-color
 -webkit-border-start longhands=-webkit-border-start-width;-webkit-border-start-style;-webkit-border-start-color
--webkit-column-rule longhands=-webkit-column-rule-width;-webkit-column-rule-style;-webkit-column-rule-color
--webkit-columns longhands=-webkit-column-width;-webkit-column-count
 -webkit-margin-collapse longhands=-webkit-margin-before-collapse;-webkit-margin-after-collapse
 -webkit-mask longhands=-webkit-mask-image;-webkit-mask-position-x;-webkit-mask-position-y;-webkit-mask-size;-webkit-mask-repeat-x;-webkit-mask-repeat-y;-webkit-mask-origin;-webkit-mask-clip
 -webkit-mask-box-image longhands=-webkit-mask-box-image-source;-webkit-mask-box-image-slice;-webkit-mask-box-image-width;-webkit-mask-box-image-outset;-webkit-mask-box-image-repeat
@@ -512,6 +512,15 @@ transition longhands=transition-property;transition-duration;transition-timing-f
 -webkit-border-top-right-radius alias_for=border-top-right-radius
 -webkit-box-shadow alias_for=box-shadow
 -webkit-box-sizing alias_for=box-sizing
+-webkit-column-count alias_for=column-count
+-webkit-column-gap alias_for=column-gap
+-webkit-column-rule alias_for=column-rule
+-webkit-column-rule-color alias_for=column-rule-color
+-webkit-column-rule-style alias_for=column-rule-style
+-webkit-column-rule-width alias_for=column-rule-width
+-webkit-column-span alias_for=column-span
+-webkit-column-width alias_for=column-width
+-webkit-columns alias_for=columns
 -webkit-flex alias_for=flex
 -webkit-flex-basis alias_for=flex-basis
 -webkit-flex-direction alias_for=flex-direction