Change error handling.

dart_vm_standalone/rasta_errors.dart

+// Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE.md file.
+library dart.core._rasta_errors;
+
+// RastaK generates calls to these methods -- all backends must provide them
+// in their patch for "dart:core".
+//
+// In the future, we could have a single `rasta_errors.dart` for all backends to
+// ensure consistent error messages across all backends.
+//
+// But for now, we just want errors that are consistent with the VM, so these
+// methods just reuse what is in the VM.
+
+_unresolvedConstructorError(
+    Object typeLiteral,
+    String fullConstructorName,
+    List arguments,
+    Map<Symbol, dynamic> namedArguments,
+    List existingArgumentNames) {
+  return new NoSuchMethodError._withType(
+      typeLiteral,
+      fullConstructorName,
+      _InvocationMirror._CONSTRUCTOR << _InvocationMirror._CALL_SHIFT,
+      arguments,
+      namedArguments,
+      existingArgumentNames);
+}
+
+_malformedTypeError(String errorMessage) {
+  return new _TypeError._create(null, null, null, errorMessage);
+}