Roll Observatory packages and add a roll script

source_maps/lib/src/utils.dart

Index: source_maps/lib/src/utils.dart
diff --git a/source_maps/lib/src/utils.dart b/source_maps/lib/src/utils.dart
deleted file mode 100644
index 78f098e70b194e6ad8211d8d1c8cb94b5f88a463..0000000000000000000000000000000000000000
--- a/source_maps/lib/src/utils.dart
+++ /dev/null
@@ -1,29 +0,0 @@
-// Copyright (c) 2013, 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.
-
-/// Utilities that shouldn't be in this package.
-library source_maps.utils;
-
-/// Find the first entry in a sorted [list] that matches a monotonic predicate.
-/// Given a result `n`, that all items before `n` will not match, `n` matches,
-/// and all items after `n` match too. The result is -1 when there are no
-/// items, 0 when all items match, and list.length when none does.
-// TODO(sigmund): remove this function after dartbug.com/5624 is fixed.
-int binarySearch(List list, bool matches(item)) {
-  if (list.length == 0) return -1;
-  if (matches(list.first)) return 0;
-  if (!matches(list.last)) return list.length;
-
-  int min = 0;
-  int max = list.length - 1;
-  while (min < max) {
-    var half = min + ((max - min) ~/ 2);
-    if (matches(list[half])) {
-      max = half;
-    } else {
-      min = half + 1;
-    }
-  }
-  return max;
-}