Add a runtime flag for navigator content utils

Source/modules/navigatorcontentutils/NavigatorContentUtils.idl

Index: Source/modules/navigatorcontentutils/NavigatorContentUtils.idl
diff --git a/Source/modules/navigatorcontentutils/NavigatorContentUtils.idl b/Source/modules/navigatorcontentutils/NavigatorContentUtils.idl
index a9f4b3114b18acd7beb6b9dbc0c7e7278608d379..1e42736496243dc561d96dcb7aa54faa51733175 100644
--- a/Source/modules/navigatorcontentutils/NavigatorContentUtils.idl
+++ b/Source/modules/navigatorcontentutils/NavigatorContentUtils.idl
@@ -20,8 +20,8 @@
 
 // http://www.w3.org/TR/html5/system-state-and-capabilities.html#custom-handlers
 partial interface Navigator {
-    [Conditional=NAVIGATOR_CONTENT_UTILS, RaisesException] void registerProtocolHandler(DOMString scheme, DOMString url, DOMString title);
-    [Conditional=NAVIGATOR_CONTENT_UTILS&CUSTOM_SCHEME_HANDLER, RaisesException] DOMString isProtocolHandlerRegistered(DOMString scheme, DOMString url);
-    [Conditional=NAVIGATOR_CONTENT_UTILS&CUSTOM_SCHEME_HANDLER, RaisesException] void unregisterProtocolHandler(DOMString scheme, DOMString url);
+    [RuntimeEnabled=NavigatorContentUtils, RaisesException] void registerProtocolHandler(DOMString scheme, DOMString url, DOMString title);
+    [RuntimeEnabled=NavigatorContentUtils, Conditional=CUSTOM_SCHEME_HANDLER, RaisesException] DOMString isProtocolHandlerRegistered(DOMString scheme, DOMString url);
+    [RuntimeEnabled=NavigatorContentUtils, Conditional=CUSTOM_SCHEME_HANDLER, RaisesException] void unregisterProtocolHandler(DOMString scheme, DOMString url);
 };