ES6 symbols: prevent reflection and proxy APIs from leaking symbols

src/object-observe.js

Index: src/object-observe.js
diff --git a/src/object-observe.js b/src/object-observe.js
index b35f547eda0b89f5a1530e39d552f8f86b55e601..bfb4a6545a324ce600b7334a86030937c970ce2d 100644
--- a/src/object-observe.js
+++ b/src/object-observe.js
@@ -117,6 +117,9 @@ function ObjectUnobserve(object, callback) {
 }
 
 function EnqueueChangeRecord(changeRecord, observers) {
+  // TODO(rossberg): adjust once there is a story for symbols vs proxies.
+  if (IS_SYMBOL(changeRecord.name)) return;
+
   for (var i = 0; i < observers.length; i++) {
     var observer = observers[i];
     var observerInfo = observerInfoMap.get(observer);