Use failedAt in more places

pkg/compiler/lib/src/parser/node_listener.dart

Index: pkg/compiler/lib/src/parser/node_listener.dart
diff --git a/pkg/compiler/lib/src/parser/node_listener.dart b/pkg/compiler/lib/src/parser/node_listener.dart
index ce704a6395635276530f33b31d1aa8a12ec77ee5..29e1000dc855f82eb4f5b821f82d63cb97097e01 100644
--- a/pkg/compiler/lib/src/parser/node_listener.dart
+++ b/pkg/compiler/lib/src/parser/node_listener.dart
@@ -1072,6 +1072,6 @@ class NodeListener extends ElementListener {
   void internalError({Token token, Node node}) {
     // TODO(ahe): This should call reporter.internalError.
     Spannable spannable = (token == null) ? node : token;
-    throw new SpannableAssertionFailure(spannable, 'Internal error in parser.');
+    failedAt(spannable, 'Internal error in parser.');
   }
 }