Introduce .isMalformed

pkg/compiler/lib/src/resolution/signatures.dart

 // Copyright (c) 2014, 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 file.
 
 library dart2js.resolution.signatures;
 
 import '../common.dart';
 import '../compiler.dart' show
     Compiler;
 import '../dart_types.dart';
@@ skipping 292 matching lines @@
        bool isFunctionExpression: false}) {
     DiagnosticReporter reporter = compiler.reporter;
 
     SignatureResolver visitor = new SignatureResolver(compiler, element,
         registry, defaultValuesError: defaultValuesError,
         createRealParameters: createRealParameters);
     List<Element> parameters = const <Element>[];
     int requiredParameterCount = 0;
     if (formalParameters == null) {
       if (!element.isGetter) {
-        if (element.isErroneous) {
+        if (element.isMalformed) {
           // If the element is erroneous, an error should already have been
           // reported. In the case of parse errors, it is possible that there
           // are formal parameters, but something else in the method failed to
           // parse. So we suppress the message about missing formals.
           assert(invariant(element, compiler.compilationFailed));
         } else {
           reporter.reportErrorMessage(element, MessageKind.MISSING_FORMALS);
         }
       }
     } else {
@@ skipping 113 matching lines @@
 
   DartType resolveReturnType(TypeAnnotation annotation) {
     if (annotation == null) return const DynamicType();
     DartType result = resolver.resolveTypeAnnotation(annotation);
     if (result == null) {
       return const DynamicType();
     }
     return result;
   }
 }