Include DDC fixes to dart:html in the main version

tools/dom/src/EventStreamProvider.dart

Index: tools/dom/src/EventStreamProvider.dart
diff --git a/tools/dom/src/EventStreamProvider.dart b/tools/dom/src/EventStreamProvider.dart
index 7989689d1bdfb2d6ebbdee0f312cc114fd61379d..c5e929c8d17fba4ce5b87db5e2a0f7db455ede09 100644
--- a/tools/dom/src/EventStreamProvider.dart
+++ b/tools/dom/src/EventStreamProvider.dart
@@ -236,7 +236,7 @@ class _EventStreamSubscription<T extends Event> extends StreamSubscription<T> {
       this._target, this._eventType, void onData(T event), this._useCapture)
       : _onData = onData == null
             ? null
-            : _wrapZone/*<Event, dynamic>*/((e) => (onData as dynamic)(e)) {
+            : _wrapZone<Event, dynamic>((e) => (onData as dynamic)(e)) {

[vsm, 2017/05/24 13:11:49]

Feel free to skip for this CL as it's nothing you're changing.

The "onDart as dynamic" looks a bit dodgy here.  Given the types,

onData(e as T) 

or 

_wrapZone<T, dynamic>

might make more sense.

     _tryResume();
   }