Add links to Observatory documentation and bug tracking.

runtime/observatory/lib/src/elements/heap_profile.html

 <link rel="import" href="../../../../packages/polymer/polymer.html">
 <link rel="import" href="class_ref.html">
 <link rel="import" href="observatory_element.html">
 <link rel="import" href="nav_bar.html">
+<link rel="import" href="view_footer.html">
 
 <polymer-element name="heap-profile" extends="observatory-element">
 <template>
   <link rel="stylesheet" href="css/shared.css">
   <style>
     .table {
       border-collapse: collapse!important;
       margin-bottom: 20px
       table-layout: fixed;
     }
@@ skipping 154 matching lines @@
           <th class="spacer"></th>
           <th on-click="{{changeSort}}" class="clickable" title="Old Accumulated Size">{{ classTable.getColumnLabel(7) }}</th>
           <th on-click="{{changeSort}}" class="clickable" title="Old Accumulated Instances">{{ classTable.getColumnLabel(8) }}</th>
           <th on-click="{{changeSort}}" class="clickable" title="Old Current Size">{{ classTable.getColumnLabel(9) }}</th>
           <th on-click="{{changeSort}}" class="clickable" title="Old Current Instances">{{ classTable.getColumnLabel(10) }}</th>
         </tr>
       </thead>
       <tbody id="classTableBody">
       </tbody>
     </table>
-    <br><br><br>
-    <br><br><br>
+    <view-footer></view-footer>
   </div>
 </template>
 </polymer-element>
 
 <script type="application/dart" src="heap_profile.dart"></script>