Minor fixes in dart2js.

lib/compiler/implementation/resolver.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.
 
 abstract class TreeElements {
   Element operator[](Node node);
   Selector getSelector(Send send);
   DartType getType(TypeAnnotation annotation);
   bool isParameterChecked(Element element);
 }
@@ skipping 1367 matching lines @@
       // [target] may be null which means invoking noSuchMethod on
       // super.
     } else if (Elements.isUnresolved(resolvedReceiver)) {
       return null;
     } else if (resolvedReceiver.kind === ElementKind.CLASS) {
       ClassElement receiverClass = resolvedReceiver;
       receiverClass.ensureResolved(compiler);
       target = receiverClass.buildLocalScope().lookup(name);
       if (target === null) {
         // TODO(johnniwinther): With the simplified [TreeElements] invariant,
-        // try to resolve ghost elements if [currentClass] is in the patch
+        // try to resolve injected elements if [currentClass] is in the patch
         // library of [receiverClass].
 
         // TODO(karlklose): this should be reported by the caller of
         // [resolveSend] to select better warning messages for getters and
         // setters.
         return warnAndCreateErroneousElement(node, name,
                                              MessageKind.METHOD_NOT_FOUND,
                                              [receiverClass.name, name]);
       } else if (target.isInstanceMember()) {
         error(node, MessageKind.MEMBER_NOT_STATIC, [receiverClass.name, name]);
@@ skipping 1656 matching lines @@
     return result;
   }
   Element lookup(SourceString name) => localLookup(name);
   Element lexicalLookup(SourceString name) => localLookup(name);
 
   Element add(Element newElement) {
     throw "Cannot add an element in a patch library scope";
   }
   String toString() => 'PatchLibraryScope($origin,$patch)';
 }