Get archive creation working on Windows.

utils/pub/utils.dart

Index: utils/pub/utils.dart
diff --git a/utils/pub/utils.dart b/utils/pub/utils.dart
index c688190094881bae2c48d2db4bdef5b4fb64f0fb..d9932b8796ef0e7c15d1ed1bfb57c93e8464426c 100644
--- a/utils/pub/utils.dart
+++ b/utils/pub/utils.dart
@@ -123,11 +123,11 @@ String sha1(String source) =>
   CryptoUtils.bytesToHex(new SHA1().update(source.charCodes).digest());
 
 /**
- * Returns a [Future] that completes in [milliSeconds].
+ * Returns a [Future] that completes in [milliseconds].
  */
-Future sleep(int milliSeconds) {
+Future sleep(int milliseconds) {
   var completer = new Completer();
-  new Timer(milliSeconds, completer.complete);
+  new Timer(milliseconds, completer.complete);
   return completer.future;
 }