Revert "Revert "Implement CSS3TextDecorations runtime flag in favor of CSS3_TEXT""

Source/core/page/RuntimeCSSEnabled.cpp

Index: Source/core/page/RuntimeCSSEnabled.cpp
diff --git a/Source/core/page/RuntimeCSSEnabled.cpp b/Source/core/page/RuntimeCSSEnabled.cpp
index 4fb2d4d8b231d782bef3440b8d447e2a52b724ce..23ab933c4cb276f5816e6e68fc7302a5a6ed6de8 100644
--- a/Source/core/page/RuntimeCSSEnabled.cpp
+++ b/Source/core/page/RuntimeCSSEnabled.cpp
@@ -63,6 +63,12 @@ static void setPropertySwitchesFromRuntimeFeatures(BoolVector& properties)
         CSSPropertyWebkitShapeOutside,
     };
     setCSSPropertiesEnabled(exclusionProperties, WTF_ARRAY_LENGTH(exclusionProperties), RuntimeEnabledFeatures::cssExclusionsEnabled());
+    CSSPropertyID css3TextDecorationProperties[] = {
+        CSSPropertyTextDecorationColor,
+        CSSPropertyTextDecorationLine,
+        CSSPropertyTextDecorationStyle,
+    };
+    setCSSPropertiesEnabled(css3TextDecorationProperties, WTF_ARRAY_LENGTH(css3TextDecorationProperties), RuntimeEnabledFeatures::css3TextDecorationsEnabled());
 
     RuntimeCSSEnabled::setCSSPropertyEnabled(CSSPropertyBackgroundBlendMode, RuntimeEnabledFeatures::cssCompositingEnabled());
     RuntimeCSSEnabled::setCSSPropertyEnabled(CSSPropertyMixBlendMode, RuntimeEnabledFeatures::cssCompositingEnabled());