title: Flutter's Webview - How to clear session status?
body: <p>I have an App that login to a specific page and execute some commands via Javascript. But when I start the App again it should open the login form. But, instead, it stays logged and goes to the user's screen.</p>
  
  <pre><code>        child: WebView(
                initialUrl:
                    'https://thepage.com/m/customer/account/login/',
                onWebViewCreated: (c) {
                  _webviewController = c;
                  print("cleaning the cache");
                  _webviewController.clearCache();
                },
                onPageFinished: (String page) async {
                  setState(() {
                    _isPageLoaded = true;
                  });
                },
                javascriptMode: JavascriptMode.unrestricted,
              ),
  </code></pre>
  
  <p>I tried to clean the cache, but perhaps it is not enough.</p>
  
  <pre><code>I/zygote64( 5259): Compiler allocated 6MB to compile void android.view.ViewRootImpl.performTraversals()
  I/flutter ( 5259): cleaning the cache
  </code></pre>