Minifying renamer for classes, methods and instance variables.

lib/compiler/implementation/lib/js_helper.dart

Index: lib/compiler/implementation/lib/js_helper.dart
diff --git a/lib/compiler/implementation/lib/js_helper.dart b/lib/compiler/implementation/lib/js_helper.dart
index e5476d45799af63c012c1651b46f318d88efaabe..f81c734a3aebd1abd6b88d38337b92ceeb04ab7e 100644
--- a/lib/compiler/implementation/lib/js_helper.dart
+++ b/lib/compiler/implementation/lib/js_helper.dart
@@ -864,6 +864,9 @@ throwAbstractClassInstantiationError(className) {
  *
  * Some native exceptions are mapped to new Dart instances, others are
  * returned unmodified.
+ *
+ * TODO(erikcorry): Fix this to produce consistent result regardless of
+ * minification.
  */
 unwrapException(ex) {
   // Note that we are checking if the object has the property. If it