LibJS: Make Cell::initialize() return void

Stop worrying about tiny OOMs.

Work towards #20405

Userland/Libraries/LibWeb/DOM/AbortController.cpp

@@ -25,12 +25,10 @@ AbortController::AbortController(JS::Realm& realm, JS::NonnullGCPtr<AbortSignal>
 
 AbortController::~AbortController() = default;
 
-JS::ThrowCompletionOr<void> AbortController::initialize(JS::Realm& realm)
+void AbortController::initialize(JS::Realm& realm)
 {
-    MUST_OR_THROW_OOM(Base::initialize(realm));
+    Base::initialize(realm);
     set_prototype(&Bindings::ensure_web_prototype<Bindings::AbortControllerPrototype>(realm, "AbortController"));
-
-    return {};
 }
 
 void AbortController::visit_edges(Cell::Visitor& visitor)

Userland/Libraries/LibWeb/DOM/AbortController.h

@@ -28,7 +28,7 @@ public:
 private:
     AbortController(JS::Realm&, JS::NonnullGCPtr<AbortSignal>);
 
-    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
+    virtual void initialize(JS::Realm&) override;
     virtual void visit_edges(Cell::Visitor&) override;
 
     // https://dom.spec.whatwg.org/#abortcontroller-signal

Userland/Libraries/LibWeb/DOM/AbortSignal.cpp

@@ -22,12 +22,10 @@ AbortSignal::AbortSignal(JS::Realm& realm)
 {
 }
 
-JS::ThrowCompletionOr<void> AbortSignal::initialize(JS::Realm& realm)
+void AbortSignal::initialize(JS::Realm& realm)
 {
-    MUST_OR_THROW_OOM(Base::initialize(realm));
+    Base::initialize(realm);
     set_prototype(&Bindings::ensure_web_prototype<Bindings::AbortSignalPrototype>(realm, "AbortSignal"));
-
-    return {};
 }
 
 // https://dom.spec.whatwg.org/#abortsignal-add

Userland/Libraries/LibWeb/DOM/AbortSignal.h

@@ -43,7 +43,7 @@ public:
 private:
     explicit AbortSignal(JS::Realm&);
 
-    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
+    virtual void initialize(JS::Realm&) override;
     virtual void visit_edges(JS::Cell::Visitor&) override;
 
     // https://dom.spec.whatwg.org/#abortsignal-abort-reason

Userland/Libraries/LibWeb/DOM/AbstractRange.cpp

@@ -21,12 +21,10 @@ AbstractRange::AbstractRange(Node& start_container, u32 start_offset, Node& end_
 
 AbstractRange::~AbstractRange() = default;
 
-JS::ThrowCompletionOr<void> AbstractRange::initialize(JS::Realm& realm)
+void AbstractRange::initialize(JS::Realm& realm)
 {
-    MUST_OR_THROW_OOM(Base::initialize(realm));
+    Base::initialize(realm);
     set_prototype(&Bindings::ensure_web_prototype<Bindings::AbstractRangePrototype>(realm, "AbstractRange"));
-
-    return {};
 }
 
 void AbstractRange::visit_edges(Cell::Visitor& visitor)

Userland/Libraries/LibWeb/DOM/AbstractRange.h

@@ -36,7 +36,7 @@ public:
 protected:
     AbstractRange(Node& start_container, u32 start_offset, Node& end_container, u32 end_offset);
 
-    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
+    virtual void initialize(JS::Realm&) override;
     virtual void visit_edges(Cell::Visitor&) override;
 
     JS::NonnullGCPtr<Node> m_start_container;

Userland/Libraries/LibWeb/DOM/Attr.cpp

@@ -38,12 +38,10 @@ Attr::Attr(Document& document, QualifiedName qualified_name, DeprecatedString va
 {
 }
 
-JS::ThrowCompletionOr<void> Attr::initialize(JS::Realm& realm)
+void Attr::initialize(JS::Realm& realm)
 {
-    MUST_OR_THROW_OOM(Base::initialize(realm));
+    Base::initialize(realm);
     set_prototype(&Bindings::ensure_web_prototype<Bindings::AttrPrototype>(realm, "Attr"));
-
-    return {};
 }
 
 void Attr::visit_edges(Cell::Visitor& visitor)

Userland/Libraries/LibWeb/DOM/Attr.h

@@ -46,7 +46,7 @@ public:
 private:
     Attr(Document&, QualifiedName, DeprecatedString value, Element*);
 
-    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
+    virtual void initialize(JS::Realm&) override;
     virtual void visit_edges(Cell::Visitor&) override;
 
     QualifiedName m_qualified_name;

Userland/Libraries/LibWeb/DOM/CDATASection.cpp

@@ -16,12 +16,10 @@ CDATASection::CDATASection(Document& document, DeprecatedString const& data)
 
 CDATASection::~CDATASection() = default;
 
-JS::ThrowCompletionOr<void> CDATASection::initialize(JS::Realm& realm)
+void CDATASection::initialize(JS::Realm& realm)
 {
-    MUST_OR_THROW_OOM(Base::initialize(realm));
+    Base::initialize(realm);
     set_prototype(&Bindings::ensure_web_prototype<Bindings::CDATASectionPrototype>(realm, "CDATASection"));
-
-    return {};
 }
 
 }

Userland/Libraries/LibWeb/DOM/CDATASection.h

@@ -23,7 +23,7 @@ public:
 private:
     CDATASection(Document&, DeprecatedString const&);
 
-    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
+    virtual void initialize(JS::Realm&) override;
 };
 
 template<>

Userland/Libraries/LibWeb/DOM/CharacterData.cpp

@@ -19,12 +19,10 @@ CharacterData::CharacterData(Document& document, NodeType type, DeprecatedString
 {
 }
 
-JS::ThrowCompletionOr<void> CharacterData::initialize(JS::Realm& realm)
+void CharacterData::initialize(JS::Realm& realm)
 {
-    MUST_OR_THROW_OOM(Base::initialize(realm));
+    Base::initialize(realm);
     set_prototype(&Bindings::ensure_web_prototype<Bindings::CharacterDataPrototype>(realm, "CharacterData"));
-
-    return {};
 }
 
 // https://dom.spec.whatwg.org/#dom-characterdata-data

Userland/Libraries/LibWeb/DOM/CharacterData.h

@@ -36,7 +36,7 @@ public:
 protected:
     CharacterData(Document&, NodeType, DeprecatedString const&);
 
-    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
+    virtual void initialize(JS::Realm&) override;
 
 private:
     DeprecatedString m_data;

Userland/Libraries/LibWeb/DOM/Comment.cpp

@@ -23,12 +23,10 @@ WebIDL::ExceptionOr<JS::NonnullGCPtr<Comment>> Comment::construct_impl(JS::Realm
     return MUST_OR_THROW_OOM(realm.heap().allocate<Comment>(realm, window.associated_document(), data));
 }
 
-JS::ThrowCompletionOr<void> Comment::initialize(JS::Realm& realm)
+void Comment::initialize(JS::Realm& realm)
 {
-    MUST_OR_THROW_OOM(Base::initialize(realm));
+    Base::initialize(realm);
     set_prototype(&Bindings::ensure_web_prototype<Bindings::CommentPrototype>(realm, "Comment"));
-
-    return {};
 }
 
 }

Userland/Libraries/LibWeb/DOM/Comment.h

@@ -23,7 +23,7 @@ public:
 private:
     Comment(Document&, DeprecatedString const&);
 
-    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
+    virtual void initialize(JS::Realm&) override;
 };
 
 template<>

Userland/Libraries/LibWeb/DOM/CustomEvent.cpp

@@ -29,12 +29,10 @@ CustomEvent::CustomEvent(JS::Realm& realm, FlyString const& event_name, CustomEv
 
 CustomEvent::~CustomEvent() = default;
 
-JS::ThrowCompletionOr<void> CustomEvent::initialize(JS::Realm& realm)
+void CustomEvent::initialize(JS::Realm& realm)
 {
-    MUST_OR_THROW_OOM(Base::initialize(realm));
+    Base::initialize(realm);
     set_prototype(&Bindings::ensure_web_prototype<Bindings::CustomEventPrototype>(realm, "CustomEvent"));
-
-    return {};
 }
 
 void CustomEvent::visit_edges(JS::Cell::Visitor& visitor)

Userland/Libraries/LibWeb/DOM/CustomEvent.h

@@ -29,7 +29,7 @@ public:
     // https://dom.spec.whatwg.org/#dom-customevent-detail
     JS::Value detail() const { return m_detail; }
 
-    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
+    virtual void initialize(JS::Realm&) override;
     virtual void visit_edges(JS::Cell::Visitor&) override;
 
     void init_custom_event(String const& type, bool bubbles, bool cancelable, JS::Value detail);

Userland/Libraries/LibWeb/DOM/DOMImplementation.cpp

@@ -31,12 +31,10 @@ DOMImplementation::DOMImplementation(Document& document)
 
 DOMImplementation::~DOMImplementation() = default;
 
-JS::ThrowCompletionOr<void> DOMImplementation::initialize(JS::Realm& realm)
+void DOMImplementation::initialize(JS::Realm& realm)
 {
-    MUST_OR_THROW_OOM(Base::initialize(realm));
+    Base::initialize(realm);
     set_prototype(&Bindings::ensure_web_prototype<Bindings::DOMImplementationPrototype>(realm, "DOMImplementation"));
-
-    return {};
 }
 
 void DOMImplementation::visit_edges(Cell::Visitor& visitor)

Userland/Libraries/LibWeb/DOM/DOMImplementation.h

@@ -30,7 +30,7 @@ public:
 private:
     explicit DOMImplementation(Document&);
 
-    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
+    virtual void initialize(JS::Realm&) override;
     virtual void visit_edges(Cell::Visitor&) override;
 
     Document& document() { return m_document; }

Userland/Libraries/LibWeb/DOM/DOMTokenList.cpp

@@ -68,12 +68,10 @@ DOMTokenList::DOMTokenList(Element& associated_element, DeprecatedFlyString asso
     associated_attribute_changed(value);
 }
 
-JS::ThrowCompletionOr<void> DOMTokenList::initialize(JS::Realm& realm)
+void DOMTokenList::initialize(JS::Realm& realm)
 {
-    MUST_OR_THROW_OOM(Base::initialize(realm));
+    Base::initialize(realm);
     set_prototype(&Bindings::ensure_web_prototype<Bindings::DOMTokenListPrototype>(realm, "DOMTokenList"));
-
-    return {};
 }
 
 void DOMTokenList::visit_edges(Cell::Visitor& visitor)

Userland/Libraries/LibWeb/DOM/DOMTokenList.h

@@ -46,7 +46,7 @@ public:
 private:
     DOMTokenList(Element& associated_element, DeprecatedFlyString associated_attribute);
 
-    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
+    virtual void initialize(JS::Realm&) override;
     virtual void visit_edges(Cell::Visitor&) override;
 
     // ^Bindings::LegacyPlatformObject

Userland/Libraries/LibWeb/DOM/Document.cpp

@@ -336,16 +336,14 @@ Document::~Document()
     HTML::main_thread_event_loop().unregister_document({}, *this);
 }
 
-JS::ThrowCompletionOr<void> Document::initialize(JS::Realm& realm)
+void Document::initialize(JS::Realm& realm)
 {
-    MUST_OR_THROW_OOM(Base::initialize(realm));
+    Base::initialize(realm);
     set_prototype(&Bindings::ensure_web_prototype<Bindings::DocumentPrototype>(realm, "Document"));
 
-    m_selection = MUST_OR_THROW_OOM(heap().allocate<Selection::Selection>(realm, realm, *this));
+    m_selection = MUST(heap().allocate<Selection::Selection>(realm, realm, *this));
 
-    m_list_of_available_images = TRY_OR_THROW_OOM(realm.vm(), try_make<HTML::ListOfAvailableImages>());
-
-    return {};
+    m_list_of_available_images = make<HTML::ListOfAvailableImages>();
 }
 
 void Document::visit_edges(Cell::Visitor& visitor)

Userland/Libraries/LibWeb/DOM/Document.h

@@ -500,7 +500,7 @@ public:
     void shared_declarative_refresh_steps(StringView input, JS::GCPtr<HTML::HTMLMetaElement const> meta_element = nullptr);
 
 protected:
-    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
+    virtual void initialize(JS::Realm&) override;
     virtual void visit_edges(Cell::Visitor&) override;
 
     Document(JS::Realm&, AK::URL const&);

Userland/Libraries/LibWeb/DOM/DocumentFragment.cpp

@@ -14,12 +14,10 @@ DocumentFragment::DocumentFragment(Document& document)
 {
 }
 
-JS::ThrowCompletionOr<void> DocumentFragment::initialize(JS::Realm& realm)
+void DocumentFragment::initialize(JS::Realm& realm)
 {
-    MUST_OR_THROW_OOM(Base::initialize(realm));
+    Base::initialize(realm);
     set_prototype(&Bindings::ensure_web_prototype<Bindings::DocumentFragmentPrototype>(realm, "DocumentFragment"));
-
-    return {};
 }
 
 void DocumentFragment::visit_edges(Cell::Visitor& visitor)

Userland/Libraries/LibWeb/DOM/DocumentFragment.h

@@ -33,7 +33,7 @@ public:
 protected:
     explicit DocumentFragment(Document& document);
 
-    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
+    virtual void initialize(JS::Realm&) override;
     virtual void visit_edges(Cell::Visitor&) override;
 
 private:

Userland/Libraries/LibWeb/DOM/DocumentType.cpp

@@ -19,12 +19,10 @@ DocumentType::DocumentType(Document& document)
 {
 }
 
-JS::ThrowCompletionOr<void> DocumentType::initialize(JS::Realm& realm)
+void DocumentType::initialize(JS::Realm& realm)
 {
-    MUST_OR_THROW_OOM(Base::initialize(realm));
+    Base::initialize(realm);
     set_prototype(&Bindings::ensure_web_prototype<Bindings::DocumentTypePrototype>(realm, "DocumentType"));
-
-    return {};
 }
 
 }

Userland/Libraries/LibWeb/DOM/DocumentType.h

@@ -36,7 +36,7 @@ public:
 private:
     explicit DocumentType(Document&);
 
-    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
+    virtual void initialize(JS::Realm&) override;
 
     DeprecatedString m_name;
     DeprecatedString m_public_id;

Userland/Libraries/LibWeb/DOM/Element.cpp

@@ -70,16 +70,12 @@ Element::Element(Document& document, DOM::QualifiedName qualified_name)
 
 Element::~Element() = default;
 
-JS::ThrowCompletionOr<void> Element::initialize(JS::Realm& realm)
+void Element::initialize(JS::Realm& realm)
 {
-    MUST_OR_THROW_OOM(Base::initialize(realm));
+    Base::initialize(realm);
     set_prototype(&Bindings::ensure_web_prototype<Bindings::ElementPrototype>(realm, "Element"));
 
-    m_attributes = TRY(Bindings::throw_dom_exception_if_needed(realm.vm(), [&]() {
-        return NamedNodeMap::create(*this);
-    }));
-
-    return {};
+    m_attributes = MUST(NamedNodeMap::create(*this));
 }
 
 void Element::visit_edges(Cell::Visitor& visitor)

Userland/Libraries/LibWeb/DOM/Element.h

@@ -324,7 +324,7 @@ public:
 
 protected:
     Element(Document&, DOM::QualifiedName);
-    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
+    virtual void initialize(JS::Realm&) override;
 
     virtual void children_changed() override;
     virtual i32 default_tab_index_value() const;

Userland/Libraries/LibWeb/DOM/Event.cpp

@@ -41,12 +41,10 @@ Event::Event(JS::Realm& realm, FlyString const& type, EventInit const& event_ini
 {
 }
 
-JS::ThrowCompletionOr<void> Event::initialize(JS::Realm& realm)
+void Event::initialize(JS::Realm& realm)
 {
-    MUST_OR_THROW_OOM(Base::initialize(realm));
+    Base::initialize(realm);
     set_prototype(&Bindings::ensure_web_prototype<Bindings::EventPrototype>(realm, "Event"));
-
-    return {};
 }
 
 void Event::visit_edges(Visitor& visitor)

Userland/Libraries/LibWeb/DOM/Event.h

@@ -146,7 +146,7 @@ public:
 protected:
     void initialize_event(String const&, bool, bool);
 
-    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
+    virtual void initialize(JS::Realm&) override;
     virtual void visit_edges(Visitor&) override;
 
 private:

Userland/Libraries/LibWeb/DOM/EventTarget.cpp

@@ -52,16 +52,14 @@ WebIDL::ExceptionOr<JS::NonnullGCPtr<EventTarget>> EventTarget::construct_impl(J
     return MUST_OR_THROW_OOM(realm.heap().allocate<EventTarget>(realm, realm));
 }
 
-JS::ThrowCompletionOr<void> EventTarget::initialize(JS::Realm& realm)
+void EventTarget::initialize(JS::Realm& realm)
 {
-    MUST_OR_THROW_OOM(Base::initialize(realm));
+    Base::initialize(realm);
 
     // FIXME: We can't do this for HTML::Window currently, as this will run when creating the initial global object.
     //        During this time, the ESO is not setup, so it will cause a nullptr dereference in host_defined_intrinsics.
     if (!is<HTML::Window>(this))
         set_prototype(&Bindings::ensure_web_prototype<Bindings::EventTargetPrototype>(realm, "EventTarget"));
-
-    return {};
 }
 
 void EventTarget::visit_edges(Cell::Visitor& visitor)

Userland/Libraries/LibWeb/DOM/EventTarget.h

@@ -64,7 +64,7 @@ protected:
 
     void element_event_handler_attribute_changed(FlyString const& local_name, Optional<String> const& value);
 
-    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
+    virtual void initialize(JS::Realm&) override;
     virtual void visit_edges(Cell::Visitor&) override;
 
 private:

Userland/Libraries/LibWeb/DOM/HTMLCollection.cpp

@@ -28,12 +28,10 @@ HTMLCollection::HTMLCollection(ParentNode& root, Scope scope, Function<bool(Elem
 
 HTMLCollection::~HTMLCollection() = default;
 
-JS::ThrowCompletionOr<void> HTMLCollection::initialize(JS::Realm& realm)
+void HTMLCollection::initialize(JS::Realm& realm)
 {
-    MUST_OR_THROW_OOM(Base::initialize(realm));
+    Base::initialize(realm);
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLCollectionPrototype>(realm, "HTMLCollection"));
-
-    return {};
 }
 
 void HTMLCollection::visit_edges(Cell::Visitor& visitor)

Userland/Libraries/LibWeb/DOM/HTMLCollection.h

@@ -52,7 +52,7 @@ public:
 protected:
     HTMLCollection(ParentNode& root, Scope, Function<bool(Element const&)> filter);
 
-    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
+    virtual void initialize(JS::Realm&) override;
 
     JS::NonnullGCPtr<ParentNode> root() { return *m_root; }
 

Userland/Libraries/LibWeb/DOM/MutationObserver.cpp

@@ -31,12 +31,10 @@ MutationObserver::MutationObserver(JS::Realm& realm, JS::GCPtr<WebIDL::CallbackT
 
 MutationObserver::~MutationObserver() = default;
 
-JS::ThrowCompletionOr<void> MutationObserver::initialize(JS::Realm& realm)
+void MutationObserver::initialize(JS::Realm& realm)
 {
-    MUST_OR_THROW_OOM(Base::initialize(realm));
+    Base::initialize(realm);
     set_prototype(&Bindings::ensure_web_prototype<Bindings::MutationObserverPrototype>(realm, "MutationObserver"));
-
-    return {};
 }
 
 void MutationObserver::visit_edges(Cell::Visitor& visitor)

Userland/Libraries/LibWeb/DOM/MutationObserver.h

@@ -51,7 +51,7 @@ public:
 private:
     MutationObserver(JS::Realm&, JS::GCPtr<WebIDL::CallbackType>);
 
-    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
+    virtual void initialize(JS::Realm&) override;
     virtual void visit_edges(Cell::Visitor&) override;
 
     // https://dom.spec.whatwg.org/#concept-mo-callback

Userland/Libraries/LibWeb/DOM/MutationRecord.cpp

@@ -33,12 +33,10 @@ MutationRecord::MutationRecord(JS::Realm& realm, FlyString const& type, Node con
 
 MutationRecord::~MutationRecord() = default;
 
-JS::ThrowCompletionOr<void> MutationRecord::initialize(JS::Realm& realm)
+void MutationRecord::initialize(JS::Realm& realm)
 {
-    MUST_OR_THROW_OOM(Base::initialize(realm));
+    Base::initialize(realm);
     set_prototype(&Bindings::ensure_web_prototype<Bindings::MutationRecordPrototype>(realm, "MutationRecord"));
-
-    return {};
 }
 
 void MutationRecord::visit_edges(Cell::Visitor& visitor)

Userland/Libraries/LibWeb/DOM/MutationRecord.h

@@ -33,7 +33,7 @@ public:
 private:
     MutationRecord(JS::Realm& realm, FlyString const& type, Node const& target, NodeList& added_nodes, NodeList& removed_nodes, Node* previous_sibling, Node* next_sibling, DeprecatedString const& attribute_name, DeprecatedString const& attribute_namespace, DeprecatedString const& old_value);
 
-    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
+    virtual void initialize(JS::Realm&) override;
     virtual void visit_edges(Cell::Visitor&) override;
 
     FlyString m_type;

Userland/Libraries/LibWeb/DOM/NamedNodeMap.cpp

@@ -25,12 +25,10 @@ NamedNodeMap::NamedNodeMap(Element& element)
 {
 }
 
-JS::ThrowCompletionOr<void> NamedNodeMap::initialize(JS::Realm& realm)
+void NamedNodeMap::initialize(JS::Realm& realm)
 {
-    MUST_OR_THROW_OOM(Base::initialize(realm));
+    Base::initialize(realm);
     set_prototype(&Bindings::ensure_web_prototype<Bindings::NamedNodeMapPrototype>(realm, "NamedNodeMap"));
-
-    return {};
 }
 
 void NamedNodeMap::visit_edges(Cell::Visitor& visitor)

Userland/Libraries/LibWeb/DOM/NamedNodeMap.h

@@ -56,7 +56,7 @@ public:
 private:
     explicit NamedNodeMap(Element&);
 
-    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
+    virtual void initialize(JS::Realm&) override;
     virtual void visit_edges(Cell::Visitor&) override;
 
     // ^Bindings::LegacyPlatformObject

Userland/Libraries/LibWeb/DOM/NodeIterator.cpp

@@ -21,12 +21,10 @@ NodeIterator::NodeIterator(Node& root)
 
 NodeIterator::~NodeIterator() = default;
 
-JS::ThrowCompletionOr<void> NodeIterator::initialize(JS::Realm& realm)
+void NodeIterator::initialize(JS::Realm& realm)
 {
-    MUST_OR_THROW_OOM(Base::initialize(realm));
+    Base::initialize(realm);
     set_prototype(&Bindings::ensure_web_prototype<Bindings::NodeIteratorPrototype>(realm, "NodeIterator"));
-
-    return {};
 }
 
 void NodeIterator::finalize()

Userland/Libraries/LibWeb/DOM/NodeIterator.h

@@ -37,7 +37,7 @@ public:
 private:
     explicit NodeIterator(Node& root);
 
-    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
+    virtual void initialize(JS::Realm&) override;
     virtual void visit_edges(Cell::Visitor&) override;
     virtual void finalize() override;
 

Userland/Libraries/LibWeb/DOM/NodeList.cpp

@@ -17,12 +17,10 @@ NodeList::NodeList(JS::Realm& realm)
 
 NodeList::~NodeList() = default;
 
-JS::ThrowCompletionOr<void> NodeList::initialize(JS::Realm& realm)
+void NodeList::initialize(JS::Realm& realm)
 {
-    MUST_OR_THROW_OOM(Base::initialize(realm));
+    Base::initialize(realm);
     set_prototype(&Bindings::ensure_web_prototype<Bindings::NodeListPrototype>(realm, "NodeList"));
-
-    return {};
 }
 
 WebIDL::ExceptionOr<JS::Value> NodeList::item_value(size_t index) const

Userland/Libraries/LibWeb/DOM/NodeList.h

@@ -27,7 +27,7 @@ public:
 protected:
     explicit NodeList(JS::Realm&);
 
-    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
+    virtual void initialize(JS::Realm&) override;
 
     // ^Bindings::LegacyPlatformObject
     virtual bool supports_indexed_properties() const final override { return true; }

Userland/Libraries/LibWeb/DOM/ProcessingInstruction.cpp

@@ -17,12 +17,10 @@ ProcessingInstruction::ProcessingInstruction(Document& document, DeprecatedStrin
 {
 }
 
-JS::ThrowCompletionOr<void> ProcessingInstruction::initialize(JS::Realm& realm)
+void ProcessingInstruction::initialize(JS::Realm& realm)
 {
-    MUST_OR_THROW_OOM(Base::initialize(realm));
+    Base::initialize(realm);
     set_prototype(&Bindings::ensure_web_prototype<Bindings::ProcessingInstructionPrototype>(realm, "ProcessingInstruction"));
-
-    return {};
 }
 
 }

Userland/Libraries/LibWeb/DOM/ProcessingInstruction.h

@@ -24,7 +24,7 @@ public:
 private:
     ProcessingInstruction(Document&, DeprecatedString const& data, DeprecatedString const& target);
 
-    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
+    virtual void initialize(JS::Realm&) override;
 
     DeprecatedString m_target;
 };

Userland/Libraries/LibWeb/DOM/Range.cpp

@@ -70,12 +70,10 @@ Range::~Range()
     live_ranges().remove(this);
 }
 
-JS::ThrowCompletionOr<void> Range::initialize(JS::Realm& realm)
+void Range::initialize(JS::Realm& realm)
 {
-    MUST_OR_THROW_OOM(Base::initialize(realm));
+    Base::initialize(realm);
     set_prototype(&Bindings::ensure_web_prototype<Bindings::RangePrototype>(realm, "Range"));
-
-    return {};
 }
 
 void Range::visit_edges(Cell::Visitor& visitor)

Userland/Libraries/LibWeb/DOM/Range.h

@@ -95,7 +95,7 @@ private:
     explicit Range(Document&);
     Range(Node& start_container, u32 start_offset, Node& end_container, u32 end_offset);
 
-    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
+    virtual void initialize(JS::Realm&) override;
     virtual void visit_edges(Cell::Visitor&) override;
 
     Node& root();

Userland/Libraries/LibWeb/DOM/ShadowRoot.cpp

@@ -19,11 +19,10 @@ ShadowRoot::ShadowRoot(Document& document, Element& host, Bindings::ShadowRootMo
     set_host(&host);
 }
 
-JS::ThrowCompletionOr<void> ShadowRoot::initialize(JS::Realm& realm)
+void ShadowRoot::initialize(JS::Realm& realm)
 {
-    MUST_OR_THROW_OOM(Base::initialize(realm));
+    Base::initialize(realm);
     set_prototype(&Bindings::ensure_web_prototype<Bindings::ShadowRootPrototype>(realm, "ShadowRoot"));
-    return {};
 }
 
 // https://dom.spec.whatwg.org/#ref-for-get-the-parent%E2%91%A6

Userland/Libraries/LibWeb/DOM/ShadowRoot.h

@@ -31,7 +31,7 @@ public:
 
 private:
     ShadowRoot(Document&, Element& host, Bindings::ShadowRootMode);
-    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
+    virtual void initialize(JS::Realm&) override;
 
     // ^Node
     virtual DeprecatedFlyString node_name() const override { return "#shadow-root"; }

Userland/Libraries/LibWeb/DOM/StaticRange.cpp

@@ -35,12 +35,10 @@ WebIDL::ExceptionOr<JS::NonnullGCPtr<StaticRange>> StaticRange::construct_impl(J
     return MUST_OR_THROW_OOM(realm.heap().allocate<StaticRange>(realm, *init.start_container, init.start_offset, *init.end_container, init.end_offset));
 }
 
-JS::ThrowCompletionOr<void> StaticRange::initialize(JS::Realm& realm)
+void StaticRange::initialize(JS::Realm& realm)
 {
-    MUST_OR_THROW_OOM(Base::initialize(realm));
+    Base::initialize(realm);
     set_prototype(&Bindings::ensure_web_prototype<Bindings::StaticRangePrototype>(realm, "StaticRange"));
-
-    return {};
 }
 
 }

Userland/Libraries/LibWeb/DOM/StaticRange.h

@@ -29,7 +29,7 @@ public:
     StaticRange(Node& start_container, u32 start_offset, Node& end_container, u32 end_offset);
     virtual ~StaticRange() override;
 
-    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
+    virtual void initialize(JS::Realm&) override;
 };
 
 }

Userland/Libraries/LibWeb/DOM/Text.cpp

@@ -24,12 +24,10 @@ Text::Text(Document& document, NodeType type, DeprecatedString const& data)
 {
 }
 
-JS::ThrowCompletionOr<void> Text::initialize(JS::Realm& realm)
+void Text::initialize(JS::Realm& realm)
 {
-    MUST_OR_THROW_OOM(Base::initialize(realm));
+    Base::initialize(realm);
     set_prototype(&Bindings::ensure_web_prototype<Bindings::TextPrototype>(realm, "Text"));
-
-    return {};
 }
 
 void Text::visit_edges(Cell::Visitor& visitor)

Userland/Libraries/LibWeb/DOM/Text.h

@@ -38,7 +38,7 @@ protected:
     Text(Document&, DeprecatedString const&);
     Text(Document&, NodeType, DeprecatedString const&);
 
-    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
+    virtual void initialize(JS::Realm&) override;
     virtual void visit_edges(Cell::Visitor&) override;
 
 private:

Userland/Libraries/LibWeb/DOM/TreeWalker.cpp

@@ -22,12 +22,10 @@ TreeWalker::TreeWalker(Node& root)
 
 TreeWalker::~TreeWalker() = default;
 
-JS::ThrowCompletionOr<void> TreeWalker::initialize(JS::Realm& realm)
+void TreeWalker::initialize(JS::Realm& realm)
 {
-    MUST_OR_THROW_OOM(Base::initialize(realm));
+    Base::initialize(realm);
     set_prototype(&Bindings::ensure_web_prototype<Bindings::TreeWalkerPrototype>(realm, "TreeWalker"));
-
-    return {};
 }
 
 void TreeWalker::visit_edges(Cell::Visitor& visitor)

Userland/Libraries/LibWeb/DOM/TreeWalker.h

@@ -39,7 +39,7 @@ public:
 private:
     explicit TreeWalker(Node& root);
 
-    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
+    virtual void initialize(JS::Realm&) override;
     virtual void visit_edges(Cell::Visitor&) override;
 
     enum class ChildTraversalType {

Userland/Libraries/LibWeb/DOM/XMLDocument.cpp

@@ -14,12 +14,10 @@ XMLDocument::XMLDocument(JS::Realm& realm, AK::URL const& url)
 {
 }
 
-JS::ThrowCompletionOr<void> XMLDocument::initialize(JS::Realm& realm)
+void XMLDocument::initialize(JS::Realm& realm)
 {
-    MUST_OR_THROW_OOM(Base::initialize(realm));
+    Base::initialize(realm);
     set_prototype(&Bindings::ensure_web_prototype<Bindings::XMLDocumentPrototype>(realm, "XMLDocument"));
-
-    return {};
 }
 
 }

Userland/Libraries/LibWeb/DOM/XMLDocument.h

@@ -19,7 +19,7 @@ public:
 private:
     XMLDocument(JS::Realm& realm, AK::URL const& url);
 
-    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
+    virtual void initialize(JS::Realm&) override;
 };
 
 }