LibJS+LibWeb: Pass prototype to Object constructor

Everyone who constructs an Object must now pass a prototype object when
applicable. There's still a fair amount of code that passes something
fetched from the Interpreter, but this brings us closer to being able
to detach prototypes from Interpreter eventually.

Libraries/LibWeb/Bindings/NavigatorObject.cpp

@@ -25,12 +25,14 @@
  */
 
 #include <AK/FlyString.h>
+#include <LibJS/Interpreter.h>
 #include <LibWeb/Bindings/NavigatorObject.h>
 
 namespace Web {
 namespace Bindings {
 
 NavigatorObject::NavigatorObject()
+    : Object(interpreter().object_prototype())
 {
     put("appCodeName", js_string(heap(), "Mozilla"));
     put("appName", js_string(heap(), "Netscape"));