Bug 1802173: Worklet.AddModule should return AbortError if fails to fetch the script. r=smaug

Differential Revision: https://phabricator.services.mozilla.com/D162867

dom/worklet/Worklet.cpp

@@ -261,7 +261,11 @@ class WorkletFetchHandler final : public PromiseNativeHandler,
   virtual void RejectedCallback(JSContext* aCx, JS::Handle<JS::Value> aValue,
                                 ErrorResult& aRv) override {
     MOZ_ASSERT(NS_IsMainThread());
-    RejectPromises(NS_ERROR_DOM_NETWORK_ERR);
+
+    // https://html.spec.whatwg.org/multipage/worklets.html#dom-worklet-addmodule
+    // Step 6.4.1. If script is null, then:
+    //   Step 1.1.2. Reject promise with an "AbortError" DOMException.
+    RejectPromises(NS_ERROR_DOM_ABORT_ERR);
   }
 
   const nsCString& URL() const { return mURL; }

testing/web-platform/meta/worklets/audio-worklet-import.https.html.ini

@@ -10,15 +10,6 @@
   [Importing an invalid URL should reject the given promise with a SyntaxError.]
     expected: FAIL
 
-  [Importing a file:// URL should reject the given promise.]
-    expected: FAIL
-
-  [Importing about:blank should reject the given promise.]
-    expected: FAIL
-
-  [Importing a cross origin resource without the Access-Control-Allow-Origin header should reject the given promise]
-    expected: FAIL
-
   [Importing a script that has a syntax error should reject the given promise.]
     expected: FAIL
 
@@ -28,5 +19,3 @@
   [Importing a script that imports an invalid identifier should reject the given promise.]
     expected: FAIL
 
-  [Importing a cross-origin-redirected resource without the Access-Control-Allow-Origin header should reject the given promise]
-    expected: FAIL