Rietveld: Display the remote tracked ref in both old and new UIs

appengine/chromium_rietveld/new_static/components/cr-issue-meta.html

 <!-- Copyright (c) 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="cr-view-handler.html">
 
 <polymer-element name="cr-issue-meta" attributes="issue">
     <template>
         <cr-view-handler></cr-view-handler>
         <link rel="stylesheet" href="common.css">
         <style>
             :host {
                 display: table;
             }
 
             .issue-meta-item {
                 display: table-row;
             }
 
             .issue-meta-type,
             .issue-meta-value {
                 padding: 0.5em 16px;
                 display: table-cell;
             }
 
-            .issue-base-url {
+            .issue-base-url,
+            .issue-target-ref {
                 word-break: break-word;
             }
 
             .issue-meta-type {
                 color: #959595;
                 font-weight: bold;
                 -webkit-user-select: none;
                 cursor: default;
             }
 
@@ skipping 44 matching lines @@
                         <a class="issue-cced" href="/user/{{ user.email }}" title="{{ user.email }}">{{ user.displayName }}</a>
                     </template>
                 </div>
             </div>
             <div class="issue-base-url issue-meta-item">
                 <div class="issue-meta-type">Base url</div>
                 <div class="issue-meta-value">
                     {{ issue.baseUrl }}
                 </div>
             </div>
+            <template if="{{ issue.targetRef }}">
+                <div class="issue-target-ref issue-meta-item">
+                    <div class="issue-meta-type">Target ref</div>
+                    <div class="issue-meta-value">{{ issue.targetRef }}</div>
+                </div>
+            </template>
             <template if="{{ issue.private }}">
                 <div class="issue-private issue-meta-item">
                     <div class="issue-meta-type">Private</div>
                     <div class="issue-meta-value">Yes</div>
                 </div>
             </template>
         </template>
     </template>
     <script>
         Polymer("cr-issue-meta", {
             issue: null,
             formatDate: function(date) {
                 return date.format("{Mon} {ord} {yyyy} {h}:{mm}{tt}");
             },
         });
     </script>
 </polymer-element>