Add observatory_pub_packages snapshot to third_party

observatory_pub_packages/polymer/src/build/utils.dart

Index: observatory_pub_packages/polymer/src/build/utils.dart
===================================================================
--- observatory_pub_packages/polymer/src/build/utils.dart	(revision 0)
+++ observatory_pub_packages/polymer/src/build/utils.dart	(working copy)
@@ -0,0 +1,32 @@
+// 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.
+
+library polymer.src.utils;
+
+/// Converts a string name with hyphens into an identifier, by removing hyphens
+/// and capitalizing the following letter. Optionally [startUppercase] to
+/// captialize the first letter.
+String toCamelCase(String hyphenedName, {bool startUppercase: false}) {
+  var segments = hyphenedName.split('-');
+  int start = startUppercase ? 0 : 1;
+  for (int i = start; i < segments.length; i++) {
+    var segment = segments[i];
+    if (segment.length > 0) {
+      // Character between 'a'..'z' mapped to 'A'..'Z'
+      segments[i] = '${segment[0].toUpperCase()}${segment.substring(1)}';
+    }
+  }
+  return segments.join('');
+}
+
+/// Reverse of [toCamelCase].
+String toHyphenedName(String word) {
+  var sb = new StringBuffer();
+  for (int i = 0; i < word.length; i++) {
+    var lower = word[i].toLowerCase();
+    if (word[i] != lower && i > 0) sb.write('-');
+    sb.write(lower);
+  }
+  return sb.toString();
+}