Add Function based profile tree

runtime/observatory/lib/utils.dart

 // Copyright (c) 2014, 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.
 
-part of app;
+library utils;
+
+import 'dart:math';
 
 class Utils {
   static String formatPercent(num a, num total) {
-      var percent = 100.0 * (a / total);
-      return '${percent.toStringAsFixed(2)}%';
+    var percent = 100.0 * (a / total);
+    return '${percent.toStringAsFixed(2)}%';
   }
 
   static String zeroPad(int value, int pad) {
     String prefix = "";
     while (pad > 1) {
       int pow10 = pow(10, pad - 1);
       if (value < pow10) {
         prefix = prefix + "0";
       }
       pad--;
@@ skipping 82 matching lines @@
     var millis = (time * millisPerSecond).round();
 
     var hours = millis ~/ millisPerHour;
     millis = millis % millisPerHour;
 
     var minutes = millis ~/ millisPerMinute;
     millis = millis % millisPerMinute;
 
     var seconds = millis ~/ millisPerSecond;
 
-    StringBuffer out = new StringBuffer();
     if (hours != 0) {
       return '${hours}h ${minutes}m ${seconds}s';
     }
     if (minutes != 0) {
       return '${minutes}m ${seconds}s';
     }
     return '${seconds}s';
   }
 
   static String formatSeconds(double x) {
     return x.toStringAsFixed(2);
   }
 
   static bool runningInJavaScript() => identical(1.0, 1);
 }