Roll IDL to Dartium37 (r181268)

core/events/EventTarget.idl

Index: core/events/EventTarget.idl
diff --git a/core/events/EventTarget.idl b/core/events/EventTarget.idl
index 0cd1b1718f06791cc18bce0b16e8efaa30c59fdf..69a4bc18d7b6e8986ae9c3dbe76371cd5ae3ba73 100644
--- a/core/events/EventTarget.idl
+++ b/core/events/EventTarget.idl
@@ -20,12 +20,15 @@
 
 [
     Custom=ToV8,
+    WillBeGarbageCollected,
 ] interface EventTarget {
-    void addEventListener(DOMString type,
-                          EventListener listener,
+    // FIXME: first 2 args should be required, but throwing TypeError breaks
+    // legacy content.  http://crbug.com/353484
+    void addEventListener([TreatNullAs=NullString] optional DOMString type,
+                          optional EventListener listener,
                           optional boolean useCapture);
-    void removeEventListener(DOMString type,
-                             EventListener listener,
+    void removeEventListener([TreatNullAs=NullString] optional DOMString type,
+                             optional EventListener listener,
                              optional boolean useCapture);
     [RaisesException] boolean dispatchEvent(Event event);
 };