Add ability to linkify hashes on isolate server

appengine/isolate/templates/browse.html

 {% set title = 'Isolate Server' %}
 {% extends "isolate/base.html" %}
 
 
 {% block headers %}
 <style>
   html, body {
-    height: 100%;
+    height: 95%;
     margin: 0;
     width: 100%;
   }
   div.use_all_space {
     margin: 0;
     overflow-y: hidden;
     padding: 0;
     width: 100%;
   }
   .monospace {
     font-family: monospace;
     white-space: pre-wrap;
   }
   iframe.use_all_space {
     margin: 0;
     overflow-y: hidden;
     padding: 0;
     width: 100%;
+    min-height: 80%;
   }
 </style>
 
 
 {#
 TODO(maruel): Reenable once Web UI authentication is switched to OAuth2.
 <script type="text/javascript" src="third_party/pako/pako-0.2.3.min.js">
 </script>
 <script>
   if (typeof String.prototype.endsWith !== 'function') {
@@ skipping 91 matching lines @@
 
 Enter the namespace and digest of an object:<br>
 <form id="form1" method="GET">
   <input id="namespace" name="namespace" value="{{namespace}}" /><br>
   <input id="digest" name="digest" maxlength=40 size=40 value="{{digest}}" />
   <br>
   <input type=submit value="Load item"/><br>
 </form>
 <p>
 <div id="generated_link"> </div>
-<p>
+</p>
 <hr>
-<div class="use_all_space monospace">{{content}}{#  <iframe id="content" class="use_all_space" sandbox="allow-same-origin"></iframe>#}</div>
 
+<div id="iframe-entry"></div>
+<iframe id="content" class="use_all_space" sandbox="allow-same-origin allow-popups" src="content?namespace={{namespace}}&digest={{digest}}">

[M-A Ruel, 2016/04/13 20:32:09]

Why allow-popups?

[kjlubick, 2016/04/14 13:18:43]

If allow-popups isn't set to true, I can't make the default behavior for the
link "open in new tab", which I think is a good default.

+</iframe>
 {% endblock %}