title: WebView doesn't show JSAlert on Lollipop devices
body: <p>It wasn't showing JSAlert on any devices. And then I set a WebChromeClient:</p>
  
  <pre><code>webView.setWebChromeClient(new WebChromeClient() {
  
              @Override
              public boolean onJsAlert(WebView view, String url, String message,
                      JsResult result) {
                  return super.onJsAlert(view, url, message, result);
              }
  
              @Override
              public boolean onJsPrompt(WebView view, String url, String message,
                      String defaultValue, JsPromptResult result) {
                  return super.onJsPrompt(view, url, message, defaultValue,
                          result);
              }
  
          });
  </code></pre>
  
  <p>Now it works fine on all pre-Lollipop devices. And doesn't show any alert on Lollipop devices. </p>
  
  <p>Logcat says "<strong>Cannot create a dialog, the WebView context is not an Activity</strong>".</p>