WebDriver: Keep WebDriver socket listening until session end

WebDriver socket should not be closed as soon as first client
got connected becaused there might more than one WebContent
process spawned by browser.

Author: kalenikaliaksandr

Userland/Services/WebDriver/Session.cpp

@@ -70,7 +70,7 @@ ErrorOr<void> Session::start(LaunchBrowserCallbacks const& callbacks)
     auto promise = TRY(ServerPromise::try_create());
 
     m_web_content_socket_path = DeprecatedString::formatted("{}/webdriver/session_{}_{}", TRY(Core::StandardPaths::runtime_directory()), getpid(), m_id);
-    auto web_content_server = TRY(create_server(promise));
+    m_web_content_server = TRY(create_server(promise));
 
     if (m_options.headless)
         m_browser_pid = TRY(callbacks.launch_headless_browser(*m_web_content_socket_path));

Userland/Services/WebDriver/Session.h

@@ -67,6 +67,8 @@ class Session {
 
     Optional<DeprecatedString> m_web_content_socket_path;
     Optional<pid_t> m_browser_pid;
+
+    RefPtr<Core::LocalServer> m_web_content_server;
 };
 
 }