Unguard Shadow DOM features.

Source/core/dom/Element.idl

Index: Source/core/dom/Element.idl
diff --git a/Source/core/dom/Element.idl b/Source/core/dom/Element.idl
index 4a3c23b2a395c50b98071314767ca237a21ebb2e..229349dd18b06afad935efc8eaccb51610cf35df 100644
--- a/Source/core/dom/Element.idl
+++ b/Source/core/dom/Element.idl
@@ -111,10 +111,10 @@
     [RaisesException, ImplementedAs=matches, MeasureAs=ElementPrefixedMatchesSelector] boolean webkitMatchesSelector(DOMString selectors);
 
     // Shadow DOM API
-    [RuntimeEnabled=ShadowDOM, Reflect, TreatNullAs=NullString, PerWorldBindings] attribute DOMString pseudo;
-    [RuntimeEnabled=ShadowDOM, RaisesException] ShadowRoot createShadowRoot();
-    [RuntimeEnabled=ShadowDOM, PerWorldBindings] readonly attribute ShadowRoot shadowRoot;
-    [RuntimeEnabled=ShadowDOM, PerWorldBindings] NodeList getDestinationInsertionPoints();
+    [Reflect, TreatNullAs=NullString, PerWorldBindings] attribute DOMString pseudo;
+    [RaisesException] ShadowRoot createShadowRoot();
+    [PerWorldBindings] readonly attribute ShadowRoot shadowRoot;
+    [PerWorldBindings] NodeList getDestinationInsertionPoints();
 
     // To-be-deprecated prefixed Shadow DOM API
     [ImplementedAs=createShadowRoot, RaisesException, MeasureAs=ShadowDOMPrefixedCreateShadowRoot] ShadowRoot webkitCreateShadowRoot();