📷 Display No Golden when golden is missing on Render Tests.

Bug: 739719
Change-Id: I24f44759324ae715a9d8abbd71753f0d3e85ab5b
Reviewed-on: https://chromium-review.googlesource.com/581189Reviewed-by: Peter Conn <peconn@chromium.org>
Reviewed-by: Bernhard Bauer <bauerb@chromium.org>
Reviewed-by: John Budorick <jbudorick@chromium.org>
Commit-Queue: Peter Conn <peconn@chromium.org>
Cr-Commit-Position: refs/heads/master@{#488646}

build/android/pylib/instrumentation/render_test.html.jinja

@@ -26,8 +26,12 @@
     <tbody style="vertical-align: top">
       <tr onclick="toggleZoom()">
         <td><img src="{{ failure_link }}" style="width: 100%" /></td>
+        {% if golden_link %}
         <td><img src="{{ golden_link }}" style="width: 100%" /></td>
         <td><img src="{{ diff_link }}" style="width: 100%" /></td>
+        {% else %}
+        <td>No Golden Image.</td>
+        {% endif %}
       </tr>
     </tbody>
   </table>