LibWeb: Introduce RemoteBrowsingContext

Remote browsing context represents top level browsing context that
lives in another WebContent process.

Userland/Libraries/LibWeb/HTML/RemoteBrowsingContext.cpp

@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2023, Aliaksandr Kalenik <kalenik.aliaksandr@gmail.com>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibWeb/HTML/RemoteBrowsingContext.h>
+
+namespace Web::HTML {
+
+JS::NonnullGCPtr<RemoteBrowsingContext> RemoteBrowsingContext::create_a_new_remote_browsing_context(String handle)
+{
+    auto browsing_context = Bindings::main_thread_vm().heap().allocate_without_realm<RemoteBrowsingContext>(handle);
+    return browsing_context;
+};
+
+HTML::WindowProxy* RemoteBrowsingContext::window_proxy()
+{
+    return nullptr;
+}
+
+HTML::WindowProxy const* RemoteBrowsingContext::window_proxy() const
+{
+    return nullptr;
+}
+
+RemoteBrowsingContext::RemoteBrowsingContext(String handle)
+    : m_window_handle(handle) {};
+
+}