Change new List(n) to return fixed length list.

sdk/lib/_internal/compiler/implementation/source_file_provider.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 source_file_provider;
 
 import 'dart:async';
 import 'dart:uri';
 import 'dart:io';
 import 'dart:utf';
 
 import '../compiler.dart' as api show Diagnostic;
 import 'dart2js.dart' show AbortLeg;
 import 'colors.dart' as colors;
 import 'source_file.dart';
 import 'filenames.dart';
 import 'util/uri_extras.dart';
 
 String readAll(String filename) {
   var file = (new File(filename)).openSync(FileMode.READ);
   var length = file.lengthSync();
-  var buffer = new List<int>.fixedLength(length);
+  var buffer = new List<int>(length);
   var bytes = file.readListSync(buffer, 0, length);
   file.closeSync();
   return new String.fromCharCodes(new Utf8Decoder(buffer).decodeRest());
 }
 
 class SourceFileProvider {
   bool isWindows = (Platform.operatingSystem == 'windows');
   Uri cwd = getCurrentDirectory();
   Map<String, SourceFile> sourceFiles = <String, SourceFile>{};
   int dartCharactersRead = 0;
@@ skipping 83 matching lines @@
       print(file.getLocationMessage(color(message), begin, end, true, color));
     }
     if (fatal && throwOnError) {
       isAborting = true;
       throw new AbortLeg(message);
     }
   }
 }