Enable interfaces.worker.html.

tests/wpt/metadata/workers/interfaces.worker.js.ini

@@ -1,3 +1,44 @@
 [interfaces.worker.html]
   type: testharness
-  disabled: https://github.com/servo/servo/issues/12654
+  [WorkerGlobalScope interface: operation close()]
+    expected: FAIL
+
+  [WorkerGlobalScope interface: attribute onlanguagechange]
+    expected: FAIL
+
+  [WorkerGlobalScope interface: attribute onoffline]
+    expected: FAIL
+
+  [WorkerGlobalScope interface: attribute ononline]
+    expected: FAIL
+
+  [WorkerGlobalScope interface: self must inherit property "close" with the proper type (2)]
+    expected: FAIL
+
+  [WorkerGlobalScope interface: self must inherit property "onlanguagechange" with the proper type (4)]
+    expected: FAIL
+
+  [WorkerGlobalScope interface: self must inherit property "onoffline" with the proper type (5)]
+    expected: FAIL
+
+  [WorkerGlobalScope interface: self must inherit property "ononline" with the proper type (6)]
+    expected: FAIL
+
+  [WorkerNavigator interface: attribute languages]
+    expected: FAIL
+
+  [WorkerNavigator interface: attribute onLine]
+    expected: FAIL
+
+  [WorkerNavigator interface: self.navigator must inherit property "languages" with the proper type (7)]
+    expected: FAIL
+
+  [WorkerNavigator interface: self.navigator must inherit property "onLine" with the proper type (8)]
+    expected: FAIL
+
+  [WorkerLocation interface: attribute origin]
+    expected: FAIL
+
+  [WorkerLocation interface: self.location must inherit property "origin" with the proper type (1)]
+    expected: FAIL
+