Add support for CSS3 "text-decoration" shorthand

Source/core/css/StylePropertyShorthand.cpp

Index: Source/core/css/StylePropertyShorthand.cpp
diff --git a/Source/core/css/StylePropertyShorthand.cpp b/Source/core/css/StylePropertyShorthand.cpp
index 8d0de73e067d1f061be88c4db7e47e9ab22ea216..badf3be58d6c10e42e313fe22aca5199eb3c92f0 100644
--- a/Source/core/css/StylePropertyShorthand.cpp
+++ b/Source/core/css/StylePropertyShorthand.cpp
@@ -465,6 +465,17 @@ const StylePropertyShorthand& webkitMaskRepeatShorthand()
     return webkitMaskRepeatLonghands;
 }
 
+const StylePropertyShorthand& textDecorationShorthand()
+{
+    static const CSSPropertyID textDecorationProperties[] = {
+        CSSPropertyTextDecorationLine,
+        CSSPropertyTextDecorationStyle,
+        CSSPropertyTextDecorationColor
+    };
+    DEFINE_STATIC_LOCAL(StylePropertyShorthand, textDecorationLonghands, (CSSPropertyTextDecoration, textDecorationProperties, WTF_ARRAY_LENGTH(textDecorationProperties)));
+    return textDecorationLonghands;
+}
+
 const StylePropertyShorthand& webkitTextEmphasisShorthand()
 {
     static const CSSPropertyID textEmphasisProperties[] = {
@@ -569,6 +580,8 @@ const StylePropertyShorthand& shorthandForProperty(CSSPropertyID propertyID)
         return overflowShorthand();
     case CSSPropertyPadding:
         return paddingShorthand();
+    case CSSPropertyTextDecoration:
+        return textDecorationShorthand();
     case CSSPropertyTransition:
         return transitionShorthand();
     case CSSPropertyWebkitAnimation:
@@ -905,6 +918,12 @@ const Vector<StylePropertyShorthand> matchingShorthandsForLonghand(CSSPropertyID
         map.set(CSSPropertyWebkitMaskRepeatX, maskRepeat);
         map.set(CSSPropertyWebkitMaskRepeatY, maskRepeat);
 
+        Vector<StylePropertyShorthand, 1> textDecoration;
+        textDecoration.uncheckedAppend(textDecorationShorthand());
+        map.set(CSSPropertyTextDecorationLine, textDecoration);
+        map.set(CSSPropertyTextDecorationStyle, textDecoration);
+        map.set(CSSPropertyTextDecorationColor, textDecoration);
+
         Vector<StylePropertyShorthand, 1> textEmphasis;
         textEmphasis.uncheckedAppend(webkitTextEmphasisShorthand());
         map.set(CSSPropertyWebkitTextEmphasisStyle, textEmphasis);