title: chrome.history.deleteUrl not working
body: <p>I just tried <code>chrome.history.deleteURL</code> in an HTML page and it's not working. Can anyone say where I am going wrong?</p>
  
  <p>Urls.html:</p>
  
  <pre><code>&lt;!DOCTYPE HTML&gt;
  &lt;html&gt;
      &lt;head&gt;
          &lt;title&gt;Your History&lt;/title&gt;
          &lt;style&gt;
              body {min-width: 300px;}
          &lt;/style&gt;
          &lt;script type="text/Javascript"&gt;
              function deleteURL(form){
                  var urlName = form.url.value;
                  chrome.history.deleteUrl(urlName);
              }
          &lt;/script&gt;
      &lt;/head&gt;
      &lt;body&gt;
          &lt;form onSubmit="deleteURL(this);"&gt;
              Enter url here : &lt;input type="text" name="url" /&gt;
              &lt;input type="submit" value="submit" /&gt;
          &lt;/form&gt;
      &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>manifest.json:</p>
  
  <pre><code>{
      "name": "Browser History",
      "version": "1.0",
      "description": "Shows up the history",
      "permissions": [
          "history",
          "tabs"
      ],
      "browser_action": {
          "default_popup": "Urls.html",
          "default_icon": "history.jpg"
      }
  }
  </code></pre>
  
  <p>After executing the program I can still see the URL which I wanted to delete. </p>