CSS Transforms: Implement transform-style

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 bd5cdcd3459bdeca1707377a9f2ede3e5e2d6409..000a3455b4de9557f62c12a1bf0fc8df25d14dec 100644
--- a/Source/core/css/parser/BisonCSSParser-in.cpp
+++ b/Source/core/css/parser/BisonCSSParser-in.cpp
@@ -687,6 +687,7 @@ bool isValidKeywordPropertyAndValue(CSSPropertyID propertyId, int valueID, const
         if (valueID == CSSValueDisc || valueID == CSSValueCircle || valueID == CSSValueSquare || valueID == CSSValueNone)
             return true;
         break;
+    case CSSPropertyTransformStyle:
     case CSSPropertyWebkitTransformStyle:
         if (valueID == CSSValueFlat || valueID == CSSValuePreserve3d)
             return true;
@@ -821,6 +822,7 @@ bool isKeywordPropertyID(CSSPropertyID propertyId)
     case CSSPropertyWebkitTextCombine:
     case CSSPropertyWebkitTextEmphasisPosition:
     case CSSPropertyWebkitTextSecurity:
+    case CSSPropertyTransformStyle:
     case CSSPropertyWebkitTransformStyle:
     case CSSPropertyWebkitUserDrag:
     case CSSPropertyWebkitUserModify: