Bug 1432522 - Performance should be an EventTarget, r=smaug

dom/webidl/Performance.webidl

@@ -14,7 +14,7 @@ typedef double DOMHighResTimeStamp;
 typedef sequence <PerformanceEntry> PerformanceEntryList;
 
 [Exposed=(Window,Worker)]
-interface Performance {
+interface Performance : EventTarget {
   [DependsOn=DeviceState, Affects=Nothing]
   DOMHighResTimeStamp now();
 

testing/web-platform/meta/hr-time/idlharness.html.ini

@@ -1,7 +0,0 @@
-[idlharness.html]
-  [Performance interface: existence and properties of interface object]
-    expected: FAIL
-
-  [Performance interface: existence and properties of interface prototype object]
-    expected: FAIL
-

testing/web-platform/meta/navigation-timing/idlharness.html.ini

@@ -1,25 +0,0 @@
-[idlharness.html]
-  [Performance interface: existence and properties of interface object]
-    expected: FAIL
-
-  [Performance interface: existence and properties of interface prototype object]
-    expected: FAIL
-
-  [EventTarget interface: window.performance must inherit property "addEventListener" with the proper type (0)]
-    expected: FAIL
-
-  [EventTarget interface: calling addEventListener(DOMString,EventListener,boolean) on window.performance with too few arguments must throw TypeError]
-    expected: FAIL
-
-  [EventTarget interface: window.performance must inherit property "removeEventListener" with the proper type (1)]
-    expected: FAIL
-
-  [EventTarget interface: calling removeEventListener(DOMString,EventListener,boolean) on window.performance with too few arguments must throw TypeError]
-    expected: FAIL
-
-  [EventTarget interface: window.performance must inherit property "dispatchEvent" with the proper type (2)]
-    expected: FAIL
-
-  [EventTarget interface: calling dispatchEvent(Event) on window.performance with too few arguments must throw TypeError]
-    expected: FAIL
-