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

samples/clock/web/clock.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 clock;
 
 import 'dart:html';
 import 'dart:math';
 
 part 'balls.dart';
@@ skipping 16 matching lines @@
 
     query("#notes").text = "${fpsAverage.round().toInt()} fps";
   }
 }
 
 class CountDownClock {
   static const int NUMBER_SPACING = 19;
   static const double BALL_WIDTH = 19.0;
   static const double BALL_HEIGHT = 19.0;
 
-  List<ClockNumber> hours = new List<ClockNumber>.fixedLength(2);
-  List<ClockNumber> minutes = new List<ClockNumber>.fixedLength(2);
-  List<ClockNumber> seconds = new List<ClockNumber>.fixedLength(2);
+  List<ClockNumber> hours = new List<ClockNumber>(2);
+  List<ClockNumber> minutes = new List<ClockNumber>(2);
+  List<ClockNumber> seconds = new List<ClockNumber>(2);
   int displayedHour = -1;
   int displayedMinute = -1;
   int displayedSecond = -1;
   Balls balls = new Balls();
 
   CountDownClock() {
     var parent = query("#canvas-content");
 
     createNumbers(parent, parent.clientWidth, parent.clientHeight);
 
@@ skipping 105 matching lines @@
 
 void setElementPosition(Element elem, double x, double y) {
   elem.style.transform = 'translate(${x}px, ${y}px)';
 }
 
 void setElementSize(Element elem, double l, double t, double r, double b) {
   setElementPosition(elem, l, t);
   elem.style.right = "${r}px";
   elem.style.bottom = "${b}px";
 }