title: Using a web worker in a local file webview
body: <p>Is it possible to use a web worker in a local html page loaded in a web view? I've got the webview setup like this</p>
  
  <pre><code>        WebSettings webSettings = myWebView.getSettings();
          webSettings.setJavaScriptEnabled(true);
          webSettings.setDomStorageEnabled(true);
          webSettings.setDatabaseEnabled(true);
          webSettings.setMixedContentMode(WebSettings.MIXED_CONTENT_ALWAYS_ALLOW);
  
          myWebView.addJavascriptInterface(new WebAppInterface(this), "AndroidApp");
  
  
          myWebView.loadUrl("file:///android_asset/popup.html");
  </code></pre>
  
  <p>But in the console I'm getting security warnings:</p>
  
  <pre><code>08-14 19:23:32.981    2042-2042/com.app.androidapp I/chromium﹕ [INFO:CONSOLE(50)] "Uncaught SecurityError: Failed to construct 'Worker': Script at 'file:///android_asset/js/worker.js' cannot be accessed from origin 'null'.", source: file:///android_asset/js/main.js (50)
  </code></pre>