Turn off warnings as errors, also allow c++11 extensions.

experimental/webtry/templates/content.html

 
 <section id=content>
   <pre><code>#include "SkCanvas.h"
 
 void draw(SkCanvas* canvas) {
   <textarea spellcheck=false name='code' id='code' rows='15' cols='80'>{{.Code}}</textarea>
 }
 </code></pre>
 
   <input type='button' value='Run' id='run'>
   <a href='{{if .Hash}}/c/{{.Hash}}{{end}}' target=_blank id=permalink>Share</a>
 
   <input type='button' value='Embed' id='embedButton' disabled/>
   <input type="text" value="" id="embed" readonly style="display:none;">
 
   <p>
   <img class='zoom' id='img' src='{{if .Hash}}/i/{{.Hash}}.png{{end}}'/>
   </p>
 
-  <h2>Errors</h2>
+  <h2>Warnings and Errors</h2>
   <pre><code id='output'></code></pre>
   <h2>Runtime output</h2>
   <pre id='stdout'></pre>
 
 </section>