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/Wrapper.h

@@ -38,7 +38,10 @@ class Wrapper
     : public JS::Object
     , public Weakable<Wrapper> {
 protected:
-    explicit Wrapper() {}
+    explicit Wrapper(Object& prototype)
+        : Object(&prototype)
+    {
+    }
 };
 
 }