Add a virtual test suite for exposed "stable" features

LayoutTests/virtual/stable/webexposed/css-properties-as-js-properties-expected.txt

Index: LayoutTests/virtual/stable/webexposed/css-properties-as-js-properties-expected.txt
diff --git a/LayoutTests/webexposed/css-properties-as-js-properties-expected.txt b/LayoutTests/virtual/stable/webexposed/css-properties-as-js-properties-expected.txt
similarity index 92%
copy from LayoutTests/webexposed/css-properties-as-js-properties-expected.txt
copy to LayoutTests/virtual/stable/webexposed/css-properties-as-js-properties-expected.txt
index ecb8e22dccb5be2184ae728c4ee7f9aae80edbfd..a49446e5832c3dfcfae93ad3cca39c4f67b5d526 100644
--- a/LayoutTests/webexposed/css-properties-as-js-properties-expected.txt
+++ b/LayoutTests/virtual/stable/webexposed/css-properties-as-js-properties-expected.txt
@@ -15,7 +15,6 @@ animationPlayState
 animationTimingFunction
 background
 backgroundAttachment
-backgroundBlendMode
 backgroundClip
 backgroundColor
 backgroundImage
@@ -108,18 +107,6 @@ fontVariant
 fontWeight
 glyphOrientationHorizontal
 glyphOrientationVertical
-gridArea
-gridAutoColumns
-gridAutoFlow
-gridAutoRows
-gridColumn
-gridColumnEnd
-gridColumnStart
-gridDefinitionColumns
-gridDefinitionRows
-gridRow
-gridRowEnd
-gridRowStart
 gridTemplate
 height
 imageRendering
@@ -151,8 +138,6 @@ maxZoom
 minHeight
 minWidth
 minZoom
-mixBlendMode
-objectFit
 opacity
 order
 orientation
@@ -198,12 +183,8 @@ strokeWidth
 tabSize
 tableLayout
 textAlign
-textAlignLast
 textAnchor
 textDecoration
-textDecorationColor
-textDecorationLine
-textDecorationStyle
 textIndent
 textLineThroughColor
 textLineThroughMode
@@ -222,7 +203,6 @@ textUnderlineMode
 textUnderlineStyle
 textUnderlineWidth
 top
-touchAction
 transition
 transitionDelay
 transitionDuration
@@ -231,7 +211,6 @@ transitionTimingFunction
 unicodeBidi
 unicodeRange
 userZoom
-var
 vectorEffect
 verticalAlign
 visibility
@@ -300,8 +279,6 @@ webkitColumnSpan
 webkitColumnWidth
 webkitColumns
 webkitFilter
-webkitFlowFrom
-webkitFlowInto
 webkitFontFeatureSettings
 webkitFontKerning
 webkitFontSizeDelta
@@ -362,16 +339,8 @@ webkitPerspectiveOrigin
 webkitPerspectiveOriginX
 webkitPerspectiveOriginY
 webkitPrintColorAdjust
-webkitRegionBreakAfter
-webkitRegionBreakBefore
-webkitRegionBreakInside
-webkitRegionFragment
 webkitRtlOrdering
 webkitRubyPosition
-webkitShapeInside
-webkitShapeMargin
-webkitShapeOutside
-webkitShapePadding
 webkitTapHighlightColor
 webkitTextCombine
 webkitTextDecorationsInEffect
@@ -399,8 +368,6 @@ webkitTransitionTimingFunction
 webkitUserDrag
 webkitUserModify
 webkitUserSelect
-webkitWrapFlow
-webkitWrapThrough
 webkitWritingMode
 whiteSpace
 widows