Fix a crash related to obsolete factory syntax.

dart/lib/compiler/implementation/scanner/listener.dart

Index: dart/lib/compiler/implementation/scanner/listener.dart
diff --git a/dart/lib/compiler/implementation/scanner/listener.dart b/dart/lib/compiler/implementation/scanner/listener.dart
index 424d17f85b17f9c4ae2cb5fa442f061d4c526f74..a989ef4ab4bae9a1384ab4160bdca955d8ecb4ba 100644
--- a/dart/lib/compiler/implementation/scanner/listener.dart
+++ b/dart/lib/compiler/implementation/scanner/listener.dart
@@ -1663,11 +1663,17 @@ class NodeListener extends ElementListener {
                         Token endToken) {
     Statement body = popNode();
     NodeList formals = popNode();
-    NodeList typeParameters = popNode(); // TODO(karlklose): don't throw away.
-    Node name = popNode();
+    // TODO(karlklose): don't throw type parameters away.
+    NodeList typeParameters;
+    Node name;
     if (periodBeforeName !== null) {
+      name = popNode();
+      typeParameters = popNode();
       // A library prefix was handled in [handleQualified].
       name = new Send(popNode(), name);
+    } else {
+      typeParameters = popNode();
+      name = popNode();
     }
     // TODO(ahe): Move this parsing to the parser.
     int modifierCount = 0;