Split AbortSignal.timeout() tests into separate files

AbortSignal.timeout() isn't exposed in ShadowRealm environments, so it
shouldn't be tested there. Split it out into a separate file, and add
another file for ShadowRealm environments testing that the property is not
present.

Author: ptomato

dom/abort/AbortSignal.any.js

@@ -12,31 +12,3 @@ async_test(t => {
   s.onabort = t.unreached_func("abort event handler called");
   t.step_timeout(() => { t.done(); }, 2000);
 }, "signal returned by AbortSignal.abort() should not fire abort event");
-
-test(t => {
-  const signal = AbortSignal.timeout(0);
-  assert_true(signal instanceof AbortSignal, "returned object is an AbortSignal");
-  assert_false(signal.aborted, "returned signal is not already aborted");
-}, "AbortSignal.timeout() returns a non-aborted signal");
-
-async_test(t => {
-  const signal = AbortSignal.timeout(5);
-  signal.onabort = t.step_func_done(() => {
-    assert_true(signal.aborted, "signal is aborted");
-    assert_true(signal.reason instanceof DOMException, "signal.reason is a DOMException");
-    assert_equals(signal.reason.name, "TimeoutError", "signal.reason is a TimeoutError");
-  });
-}, "Signal returned by AbortSignal.timeout() times out");
-
-async_test(t => {
-  let result = "";
-  for (const value of ["1", "2", "3"]) {
-    const signal = AbortSignal.timeout(5);
-    signal.onabort = t.step_func(() => { result += value; });
-  }
-
-  const signal = AbortSignal.timeout(5);
-  signal.onabort = t.step_func_done(() => {
-    assert_equals(result, "123", "Timeout order should be 123");
-  });
-}, "AbortSignal timeouts fire in order");

dom/abort/timeout-shadowrealm.any.js

@@ -0,0 +1,5 @@
+// META: global=shadowrealm
+
+test(t => {
+  assert_not_own_property(AbortSignal, "timeout", "AbortSignal does not have a 'timeout' property");
+}, "AbortSignal.timeout() is not exposed in ShadowRealm");

dom/abort/timeout.any.js

@@ -0,0 +1,29 @@
+// META: global=window,dedicatedworker
+
+test(t => {
+  const signal = AbortSignal.timeout(0);
+  assert_true(signal instanceof AbortSignal, "returned object is an AbortSignal");
+  assert_false(signal.aborted, "returned signal is not already aborted");
+}, "AbortSignal.timeout() returns a non-aborted signal");
+
+async_test(t => {
+  const signal = AbortSignal.timeout(5);
+  signal.onabort = t.step_func_done(() => {
+    assert_true(signal.aborted, "signal is aborted");
+    assert_true(signal.reason instanceof DOMException, "signal.reason is a DOMException");
+    assert_equals(signal.reason.name, "TimeoutError", "signal.reason is a TimeoutError");
+  });
+}, "Signal returned by AbortSignal.timeout() times out");
+
+async_test(t => {
+  let result = "";
+  for (const value of ["1", "2", "3"]) {
+    const signal = AbortSignal.timeout(5);
+    signal.onabort = t.step_func(() => { result += value; });
+  }
+
+  const signal = AbortSignal.timeout(5);
+  signal.onabort = t.step_func_done(() => {
+    assert_equals(result, "123", "Timeout order should be 123");
+  });
+}, "AbortSignal timeouts fire in order");