Introduce StackTraceOnThrowMixin.

runtime/lib/errors_patch.dart

Index: runtime/lib/errors_patch.dart
diff --git a/runtime/lib/errors_patch.dart b/runtime/lib/errors_patch.dart
index f14a50441bbd4e42e92db26a9034712aaf8a3cb5..31365e78100b3c94119f490ec1dd3f4c6e7ac551 100644
--- a/runtime/lib/errors_patch.dart
+++ b/runtime/lib/errors_patch.dart
@@ -6,7 +6,9 @@ patch class Error {
   /* patch */ static String _objectToString(Object object) {
     return Object._toString(object);
   }
+}
 
+patch class StackTraceOnThrowMixin {

[Lasse Reichstein Nielsen, 2013/07/12 13:00:51]

Pleeeeeeease consider dropping the "Mixin".

[floitsch, 2013/07/12 15:30:14]

Done.

   // TODO(11680): implement stackTrace on Error.
   /* patch */ StackTrace get stackTrace => null;
 }
@@ -173,7 +175,7 @@ patch class NoSuchMethodError {
   }
 }
 
-class _FiftyThreeBitOverflowError extends Error {
+class _FiftyThreeBitOverflowError extends Error with StackTraceOnThrowMixin {
   final Object _value;
 
   _FiftyThreeBitOverflowError(this._value);