dart2js: rename Elements.isErroneousElement to Elements.isErroneous.

pkg/compiler/lib/src/elements/elements.dart

 // Copyright (c) 2012, 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 elements;
 
 
 import '../constants/expressions.dart';
 import '../tree/tree.dart';
 import '../util/util.dart';
@@ skipping 410 matching lines @@
   /// Returns the [Element] that holds the [TreeElements] for this element.
   AnalyzableElement get analyzableElement;
 
   accept(ElementVisitor visitor);
 }
 
 class Elements {
   static bool isUnresolved(Element e) {
     return e == null || e.isErroneous;
   }
-  static bool isErroneousElement(Element e) => e != null && e.isErroneous;
+  static bool isErroneous(Element e) => e != null && e.isErroneous;
 
   /// Unwraps [element] reporting any warnings attached to it, if any.
   static Element unwrap(Element element,
                         DiagnosticListener listener,
                         Spannable spannable) {
     if (element != null && element.isWarnOnUse) {
       WarnOnUseElement wrappedElement = element;
       element = wrappedElement.unwrap(listener, spannable);
     }
     return element;
@@ skipping 1171 matching lines @@
   bool get isDeclaredByField;
 
   /// Returns `true` if this member is abstract.
   bool get isAbstract;
 
   /// If abstract, [implementation] points to the overridden concrete member,
   /// if any. Otherwise [implementation] points to the member itself.
   Member get implementation;
 }