Expose the chromium waterfall in sheriff-o-matic.

Tools/GardeningServer/ui/ct-results-panel.html

 <!--
 Copyright 2014 The Chromium Authors. All rights reserved.
 Use of this source code is governed by a BSD-style license that can be
 found in the LICENSE file.
 -->
 
 <link rel="import" href="../bower_components/core-menu/core-menu.html">
 <link rel="import" href="../bower_components/paper-item/paper-item.html">
 <link rel="import" href="ct-results-by-builder.html">
 <link rel="import" href="ct-embedded-flakiness-dashboard.html">
 
-<polymer-element name="ct-results-panel" attributes="failures">
+<polymer-element name="ct-results-panel" attributes="failures tree">
   <template>
     <style>
       :host {
         display: flex;
         flex-direction: column;
       }
 
       paper-item.core-selected {
         font-weight: bold;
       }
@@ skipping 27 matching lines @@
     <template if="{{ failures.length }}">
       <core-menu selected="{{ selected }}">
         <template repeat="{{ failure in failures }}">
           <template if="{{ failure.testName }}">
             <paper-item label="{{ failure.testName }}"></paper-item>
           </template>
         </template>
       </core-menu>
       <div class="results">
         <template if="{{ failures[selected].testName }}">
-          <ct-embedded-flakiness-dashboard test="{{ failures[selected] }}"></ct-embedded-flakiness-dashboard>
+          <ct-embedded-flakiness-dashboard test="{{ failures[selected] }}" tree="{{ tree }}"></ct-embedded-flakiness-dashboard>
         </template>
         <ct-results-by-builder failure="{{ failures[selected] }}"></ct-results-by-builder>
       </div>
     </template>
   </template>
   <script>
     Polymer({
       failures: [],
       selected: 0,
+      tree: '',
 
       failuresChanged: function() {
         this.selected = 0;
       },
     });
   </script>
 </polymer-element>