Generate dart:html bindings for Dartium as well as Frog. All unittests now pass (or are disabled fo…

client/html/generated/html/dartium/CustomEvent.dart

+
+class _CustomEventImpl extends _EventImpl implements CustomEvent {
+  _CustomEventImpl._wrap(ptr) : super._wrap(ptr);
+
+  Object get detail() => _wrap(_ptr.detail);
+
+  void initCustomEvent(String typeArg, bool canBubbleArg, bool cancelableArg, Object detailArg) {
+    _ptr.initCustomEvent(_unwrap(typeArg), _unwrap(canBubbleArg), _unwrap(cancelableArg), _unwrap(detailArg));
+    return;
+  }
+}