Added expand method to iterables.

runtime/lib/byte_array.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.
 
 patch class Int8List {
   /* patch */ factory Int8List(int length) {
     return new _Int8Array(length);
   }
 
   /* patch */ factory Int8List.transferable(int length) {
@@ skipping 228 matching lines @@
 
   String join([String separator]) {
     return IterableMixinWorkaround.join(this, separator);
   }
 
   dynamic reduce(dynamic initialValue,
                  dynamic combine(dynamic initialValue, element)) {
     return IterableMixinWorkaround.reduce(this, initialValue, combine);
   }
 
-  Collection where(bool f(element)) {
+  Collection where(bool f(int element)) {
     return IterableMixinWorkaround.where(this, f);
   }
 
+  Iterable expand(Iterable f(int element)) {
+    return IterableMixinWorkaround.expand(this, f);
+  }
+
   Iterable<int> take(int n) {
     return IterableMixinWorkaround.takeList(this, n);
   }
 
   Iterable<int> takeWhile(bool test(int value)) {
     return IterableMixinWorkaround.takeWhile(this, test);
   }
 
   Iterable<int> skip(int n) {
     return IterableMixinWorkaround.skipList(this, n);
@@ skipping 2410 matching lines @@
   ByteArray asByteArray([int start = 0, int length]) {
     if (length == null) {
       length = this.lengthInBytes();
     }
     _rangeCheck(this.length, start, length);
     return _array.subByteArray(_offset + start, length);
   }
 
   static const int _BYTES_PER_ELEMENT = 8;
 }