Integration of MOVE_FILE into the server and a couple of fixes.

pkg/analysis_server/test/services/refactoring/move_file_test.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 test.services.refactoring.move_files;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/protocol.dart';
 import 'package:analysis_server/src/services/refactoring/refactoring.dart';
@@ skipping 20 matching lines @@
     String pathC = '/project/000/1111/22/c.dart';
     String pathD = '/project/000/1111/333/d.dart';
     testFile = '/project/000/1111/test.dart';
     addSource('/absolute/uri.dart', '');
     addSource(pathA, 'part of lib;');
     addSource(pathB, "import 'test.dart';");
     addSource(pathC, '');
     addSource(pathD, '');
     addTestSource('''
 library lib;
+import 'dart:math';
 import '22/c.dart';
 export '333/d.dart';
 part 'a.dart';
 part '/absolute/uri.dart';
 ''');
     _performAnalysis();
     // perform refactoring
     _createRefactoring('/project/000/1111/22/new_name.dart');
     return _assertSuccessfulRefactoring().then((_) {
       assertNoFileChange(pathA);
       assertFileChangeResult(pathB, "import '22/new_name.dart';");
       assertNoFileChange(pathC);
       assertFileChangeResult(testFile, '''
 library lib;
+import 'dart:math';
 import 'c.dart';
 export '../333/d.dart';
 part '../a.dart';
 part '/absolute/uri.dart';
 ''');
     });
   }
 
   test_importedLibrary() {
     String pathA = '/project/000/1111/a.dart';
@@ skipping 115 matching lines @@
         break;
       }
       for (ChangeNotice notice in result.changeNotices) {
         if (notice.source.fullName.startsWith('/project/')) {
           index.indexUnit(context, notice.compilationUnit);
         }
       }
     }
   }
 }