Auto merge of #25590 - pshaughn:perfobs, r=jdm

Make performance observers take "type" and "buffered" options without panicking.

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I updated the observe() method to align with spec, and fixed the borrow duration bug @jdm pointed out in #25589 so it wouldn't cause a hard crash. Some tests go from failing to passing, but others go from early failing to later timeout; performance observers still aren't doing the right thing in all cases.

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- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes fix #24781 and fix #25589 and fix #23225

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- [X] There are tests for these changes

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components/script/dom/webidls/PerformanceObserver.webidl

@@ -7,8 +7,9 @@
  */
 
 dictionary PerformanceObserverInit {
-  required sequence<DOMString> entryTypes;
-  boolean buffered = false;
+  sequence<DOMString> entryTypes;
+  DOMString type;
+  boolean buffered;
 };
 
 callback PerformanceObserverCallback = void (PerformanceObserverEntryList entries, PerformanceObserver observer);
@@ -17,6 +18,8 @@ callback PerformanceObserverCallback = void (PerformanceObserverEntryList entrie
 interface PerformanceObserver {
   [Throws] constructor(PerformanceObserverCallback callback);
   [Throws]
-  void observe(PerformanceObserverInit options);
+  void observe(optional PerformanceObserverInit options = {});
   void disconnect();
+  PerformanceEntryList takeRecords();
+  // [SameObject] static readonly attribute FrozenArray<DOMString> supportedEntryTypes;
 };