LibWeb: Replace nested_browsing_context() with content_navigable()

Userland/Libraries/LibWeb/Dump.cpp

@@ -325,10 +325,8 @@ void dump_tree(StringBuilder& builder, Layout::Node const& layout_node, bool sho
 
         if (is<Layout::FrameBox>(box)) {
             auto const& frame_box = static_cast<Layout::FrameBox const&>(box);
-            if (auto* nested_browsing_context = frame_box.dom_node().nested_browsing_context()) {
-                if (auto* document = nested_browsing_context->active_document()) {
-                    builder.appendff(" (url: {})", document->url());
-                }
+            if (auto const* document = frame_box.dom_node().content_document_without_origin_check()) {
+                builder.appendff(" (url: {})", document->url());
             }
         }
 

Userland/Libraries/LibWeb/HTML/Focus.cpp

@@ -204,12 +204,11 @@ void run_focusing_steps(DOM::Node* new_focus_target, DOM::Node* fallback_target,
         new_focus_target = fallback_target;
     }
 
-    // 3. If new focus target is a navigable container with non-null nested browsing context,
-    //    then set new focus target to the nested browsing context's active document.
+    // 3. If new focus target is a navigable container with non-null content navigable, then set new focus target to the content navigable's active document.
     if (is<HTML::NavigableContainer>(*new_focus_target)) {
         auto& navigable_container = static_cast<HTML::NavigableContainer&>(*new_focus_target);
-        if (auto* nested_browsing_context = navigable_container.nested_browsing_context())
-            new_focus_target = nested_browsing_context->active_document();
+        if (auto content_navigable = navigable_container.content_navigable())
+            new_focus_target = content_navigable->active_document();
     }
 
     // FIXME: 4. If new focus target is a focusable area and its DOM anchor is inert, then return.

Userland/Libraries/LibWeb/HTML/NavigableContainer.h

@@ -24,19 +24,6 @@ public:
     JS::GCPtr<Navigable> content_navigable() { return m_content_navigable; }
     JS::GCPtr<Navigable const> content_navigable() const { return m_content_navigable.ptr(); }
 
-    BrowsingContext* nested_browsing_context()
-    {
-        if (m_content_navigable)
-            return m_content_navigable->active_browsing_context();
-        return nullptr;
-    }
-    BrowsingContext const* nested_browsing_context() const
-    {
-        if (m_content_navigable)
-            return m_content_navigable->active_browsing_context();
-        return nullptr;
-    }
-
     const DOM::Document* content_document() const;
     DOM::Document const* content_document_without_origin_check() const;