cleanup to tools/testing/dart

tools/testing/dart/lib/status_file_parser.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 status_file_parser;
 
-import "dart:async";
-import "dart:convert" show LineSplitter, UTF8;
-import "dart:io";
+import 'dart:async';
+import 'dart:convert' show LineSplitter, UTF8;
+import 'dart:io';
 
-import "path.dart";
-import "status_expression.dart";
+import 'path.dart';
+import 'status_expression.dart';
 
 class Expectation {
   // Possible outcomes of running a test.
   static Expectation PASS = byName('Pass');
   static Expectation CRASH = byName('Crash');
   static Expectation TIMEOUT = byName('Timeout');
   static Expectation FAIL = byName('Fail');
 
   // Special 'FAIL' cases
   static Expectation RUNTIME_ERROR = byName('RuntimeError');
@@ skipping 320 matching lines @@
         }
         regExps[i] = regExp;
       }
       _keyToRegExps[key] = regExps;
     });
 
     _regExpCache = null;
     _preprocessed = true;
   }
 }