Performance.onwebkitresourcetimingbufferfull should be a Function

Source/core/page/Performance.idl

Index: Source/core/page/Performance.idl
diff --git a/Source/core/page/Performance.idl b/Source/core/page/Performance.idl
index 87a5b06308f7f7b4a240620ac897ead02bfb2353..496054f8ad4049a27c77e9f0fa4e012a9df97f39 100644
--- a/Source/core/page/Performance.idl
+++ b/Source/core/page/Performance.idl
@@ -30,9 +30,7 @@
  */
 
 // See: http://dev.w3.org/2006/webapi/WebTiming/
-[
-    EventTarget
-] interface Performance {
+interface Performance {
     readonly attribute PerformanceNavigation navigation;
     readonly attribute PerformanceTiming timing;
     readonly attribute MemoryInfo memory;
@@ -45,9 +43,9 @@
     [DeprecateAs=PrefixedPerformanceTimeline,ImplementedAs=getEntriesByName] sequence<PerformanceEntry> webkitGetEntriesByName(DOMString name, [Default=NullString] optional DOMString entryType);
 
     void webkitClearResourceTimings();
-    void webkitSetResourceTimingBufferSize(unsigned long maxSize);
+    [CallWith=ScriptState] void webkitSetResourceTimingBufferSize(unsigned long maxSize);
 
-    attribute EventListener onwebkitresourcetimingbufferfull;
+    attribute Function onwebkitresourcetimingbufferfull;
 
     // See http://www.w3.org/TR/2012/CR-user-timing-20120726/
     [RaisesException,MeasureAs=UnprefixedUserTiming] void mark(DOMString markName);