title: Chrome Extension: content script is unable to load local HTML file into iframe
body: <p>There is a content script defined in manifest.json. 
  The content script is doing a simple task.
  It adds a <strong>iframe</strong> into page and trying to open a <strong>local HTML</strong> file into it. </p>
  
  <p>The problem is:</p>
  
  <pre><code>ifrm.setAttribute("src", "http://www.xyz.com/");   //working correctly.
  </code></pre>
  
  <p><strong>BUT</strong></p>
  
  <pre><code>ifrm.setAttribute("src", chrome.extension.getURL("view/abc.html")); //Not working
  </code></pre>
  
  <p>The iframe is not opening a <strong>local HTML file</strong>.</p>
  
  <p>Any suggestion...</p>