Remove position: sticky

Source/core/css/parser/BisonCSSParser-in.cpp

Index: Source/core/css/parser/BisonCSSParser-in.cpp
diff --git a/Source/core/css/parser/BisonCSSParser-in.cpp b/Source/core/css/parser/BisonCSSParser-in.cpp
index b84861114e78ed705c8ef46c9c8d81deb5d8781b..4060951e5494b4f93e01fca478a98eb673974228 100644
--- a/Source/core/css/parser/BisonCSSParser-in.cpp
+++ b/Source/core/css/parser/BisonCSSParser-in.cpp
@@ -435,9 +435,8 @@ bool isValidKeywordPropertyAndValue(CSSPropertyID propertyId, CSSValueID valueID
         // none | visiblePainted | visibleFill | visibleStroke | visible |
         // painted | fill | stroke | auto | all | bounding-box
         return valueID == CSSValueVisible || valueID == CSSValueNone || valueID == CSSValueAll || valueID == CSSValueAuto || (valueID >= CSSValueVisiblepainted && valueID <= CSSValueBoundingBox);
-    case CSSPropertyPosition: // static | relative | absolute | fixed | sticky
-        return valueID == CSSValueStatic || valueID == CSSValueRelative || valueID == CSSValueAbsolute || valueID == CSSValueFixed
-            || (RuntimeEnabledFeatures::cssStickyPositionEnabled() && valueID == CSSValueSticky);
+    case CSSPropertyPosition: // static | relative | absolute | fixed
+        return valueID == CSSValueStatic || valueID == CSSValueRelative || valueID == CSSValueAbsolute || valueID == CSSValueFixed;
     case CSSPropertyResize: // none | both | horizontal | vertical | auto
         return valueID == CSSValueNone || valueID == CSSValueBoth || valueID == CSSValueHorizontal || valueID == CSSValueVertical || valueID == CSSValueAuto;
     case CSSPropertyScrollBehavior: // instant | smooth