title: How to use "CookieManager::removeAllCookies(ValueCallback<Boolean> callback)"
body: <p>I am a newbie to java and trying to remove the <strong>WebView</strong> cookies using the method <strong>CookieManager::removeAllCookies(ValueCallback callback)</strong>. Not able to figure out what values has to be passed to the removeAllCookie method.</p>
  
  <p>The docs <a href="https://developer.android.com/reference/android/webkit/ValueCallback.html" rel="noreferrer">https://developer.android.com/reference/android/webkit/ValueCallback.html</a> and <a href="https://developer.android.com/reference/android/webkit/CookieManager.html#getInstance%28%29" rel="noreferrer">https://developer.android.com/reference/android/webkit/CookieManager.html#getInstance%28%29</a> does not say anything on how to use it. </p>
  
  <p>My understanding is ValueCallback is similar to c++ templates. But not able to get why does an object is required to be passed to remove the cookies.</p>