Use short names in 'Create File' Quick Fix messages.

pkg/analyzer/lib/src/generated/source.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.
 
 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 
 library engine.source;
 
+import 'dart:collection';
 import "dart:math" as math;
-import 'dart:collection';
 
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/source/package_map_resolver.dart';
 import 'package:analyzer/task/model.dart';
+import 'package:path/path.dart' as pathos;
 
 import 'engine.dart';
 import 'java_core.dart';
 import 'java_engine.dart';
 import 'java_io.dart' show JavaFile;
 import 'sdk.dart' show DartSdk;
 import 'source_io.dart' show FileBasedSource;
 
 /**
  * A function that is used to visit [ContentCache] entries.
@@ skipping 320 matching lines @@
   @override
   int get hashCode => fullName.hashCode;
 
   @override
   bool get isInSystemLibrary => false;
 
   @override
   int get modificationStamp => -1;
 
   @override
-  String get shortName => fullName;
+  String get shortName => pathos.basename(fullName);
 
   @override
-  bool operator ==(Object obj) {
-    if (obj is NonExistingSource) {
-      NonExistingSource other = obj;
+  bool operator ==(Object other) {
+    if (other is NonExistingSource) {
       return other.uriKind == uriKind && other.fullName == fullName;
     }
     return false;
   }
 
   @override
   bool exists() => false;
 
   @override
   Uri resolveRelativeUri(Uri relativeUri) {
@@ skipping 627 matching lines @@
 
   /**
    * Return an absolute URI that represents the given source, or `null` if a valid URI cannot
    * be computed.
    *
    * @param source the source to get URI for
    * @return the absolute URI representing the given source
    */
   Uri restoreAbsolute(Source source) => null;
 }