SheriffOMatic: Add ct-popout-iframe and switch test output iframes to use it.

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="ct-results-by-builder.html">
 <link rel="import" href="ct-embedded-flakiness-dashboard.html">
+<link rel="import" href="ct-popout-iframe.html">
 
 <polymer-element name="ct-results-panel" attributes="failures tree">
   <template>
     <style>
       :host {
         display: flex;
         flex-direction: column;
       }
 
       core-menu > div {
@@ skipping 28 matching lines @@
         flex: 1;
         overflow: auto;
         /* Stay below the box shadow of the core-menu. */
         padding-top: 6px;
       }
     </style>
     <template if="{{ !failures.length && !failures.url }}">
       <div class="message">No results to display.</div>
     </template>
     <template if="{{ failures.url }}">
-      <iframe src='{{ failures.url }}'></iframe>
+      <ct-popout-iframe src="{{ failures.url }}"></ct-popout-iframe>
     </template>
     <template if="{{ failures.length }}">
       <core-menu selected="{{ selected }}">
         <template repeat="{{ failure in failures }}">
           <template if="{{ failure.testName }}">
             <div>{{ failure.testName }}</div>
           </template>
         </template>
       </core-menu>
       <div class="results">
         <template if="{{ failures[selected].testName }}">
           <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>