fix: make Performance global an EventTarget

This commit updates the Performance global to extend
EventTarget.

cli/dts/lib.deno.shared_globals.d.ts

@@ -449,7 +449,7 @@ declare class Worker extends EventTarget {
 
 declare type PerformanceEntryList = PerformanceEntry[];
 
-declare class Performance {
+declare class Performance extends EventTarget {
   /** Returns a timestamp representing the start of the performance measurement. */
   readonly timeOrigin: number;
   constructor();

cli/tests/unit/performance_test.ts

@@ -140,3 +140,16 @@ Deno.test(function performanceMeasureIllegalConstructor() {
     "Illegal constructor",
   );
 });
+
+Deno.test(function performanceIsEventTarget() {
+  assert(performance instanceof EventTarget);
+
+  return new Promise((resolve) => {
+    const handler = () => {
+      resolve();
+    };
+
+    performance.addEventListener("test", handler, { once: true });
+    performance.dispatchEvent(new Event("test"));
+  });
+});

ext/web/15_performance.js

@@ -327,11 +327,16 @@
   }
   webidl.configurePrototype(PerformanceMeasure);
   const PerformanceMeasurePrototype = PerformanceMeasure.prototype;
-  class Performance {
-    constructor() {
+  class Performance extends EventTarget {
+    constructor(key = null) {
+      if (key != illegalConstructorKey) {
         webidl.illegalConstructor();
       }
 
+      super();
+      this[webidl.brand] = webidl.brand;
+    }
+
     get timeOrigin() {
       webidl.assertBranded(this, PerformancePrototype);
       return timeOrigin;
@@ -572,12 +577,17 @@
   webidl.configurePrototype(Performance);
   const PerformancePrototype = Performance.prototype;
 
+  webidl.converters["Performance"] = webidl.createInterfaceConverter(
+    "Performance",
+    PerformancePrototype,
+  );
+
   window.__bootstrap.performance = {
     PerformanceEntry,
     PerformanceMark,
     PerformanceMeasure,
     Performance,
-    performance: webidl.createBranded(Performance),
+    performance: new Performance(illegalConstructorKey),
     setTimeOrigin,
   };
 })(this);

tools/wpt/expectation.json

@@ -1161,12 +1161,8 @@
   "hr-time": {
     "monotonic-clock.any.html": true,
     "monotonic-clock.any.worker.html": true,
-    "basic.any.html": [
-      "Performance interface extends EventTarget."
-    ],
-    "basic.any.worker.html": [
-      "Performance interface extends EventTarget."
-    ],
+    "basic.any.html": true,
+    "basic.any.worker.html": true,
     "idlharness.any.html": [
       "Performance interface: existence and properties of interface object",
       "Performance interface: existence and properties of interface prototype object",