WebContent: Limit the Console client to the top-level navigable client

We don't want to set the intrinsic Console object's client to non-top-
level clients, created for e.g. SVG elements or subframes. We also want
to make sure the Console client is updated if the top-level document has
changed.

Userland/Services/WebContent/PageClient.cpp

@@ -342,8 +342,13 @@ void PageClient::page_did_create_new_document(Web::DOM::Document& document)
 
 void PageClient::page_did_change_active_document_in_top_level_browsing_context(Web::DOM::Document& document)
 {
+    auto& realm = document.realm();
+
     VERIFY(m_console_clients.contains(document));
     m_top_level_document_console_client = *m_console_clients.get(document).value();
+
+    auto console_object = realm.intrinsics().console_object();
+    console_object->console().set_client(*m_top_level_document_console_client);
 }
 
 void PageClient::page_did_destroy_document(Web::DOM::Document& document)
@@ -666,7 +671,6 @@ void PageClient::initialize_js_console(Web::DOM::Document& document)
     auto& realm = document.realm();
     auto console_object = realm.intrinsics().console_object();
     auto console_client = heap().allocate_without_realm<WebContentConsoleClient>(console_object->console(), document.realm(), *this);
-    console_object->console().set_client(*console_client);
 
     m_console_clients.set(document, console_client);
 }