LibWeb: Move setting of Web object prototypes to initialize()

This needs to happen before prototype/constructor intitialization can be
made lazy. Otherwise, GC could run during the C++ constructor and try to
collect the object currently being created.

Userland/Libraries/LibWeb/Fetch/Headers.cpp

@@ -33,11 +33,16 @@ Headers::Headers(JS::Realm& realm, JS::NonnullGCPtr<Infrastructure::HeaderList>
     : PlatformObject(realm)
     , m_header_list(header_list)
 {
-    set_prototype(&Bindings::cached_web_prototype(realm, "Headers"));
 }
 
 Headers::~Headers() = default;
 
+void Headers::initialize(JS::Realm& realm)
+{
+    Base::initialize(realm);
+    set_prototype(&Bindings::ensure_web_prototype<Bindings::HeadersPrototype>(realm, "Headers"));
+}
+
 void Headers::visit_edges(JS::Cell::Visitor& visitor)
 {
     Base::visit_edges(visitor);

Userland/Libraries/LibWeb/Fetch/Headers.h

@@ -60,6 +60,7 @@ private:
 
     Headers(JS::Realm&, JS::NonnullGCPtr<Infrastructure::HeaderList>);
 
+    virtual void initialize(JS::Realm&) override;
     virtual void visit_edges(JS::Cell::Visitor&) override;
 
     WebIDL::ExceptionOr<bool> validate(Infrastructure::Header const&) const;

Userland/Libraries/LibWeb/Fetch/HeadersIterator.cpp

@@ -33,11 +33,16 @@ HeadersIterator::HeadersIterator(Headers const& headers, JS::Object::PropertyKin
     , m_headers(headers)
     , m_iteration_kind(iteration_kind)
 {
-    set_prototype(&Bindings::ensure_web_prototype<Bindings::HeadersIteratorPrototype>(headers.realm(), "HeadersIterator"));
 }
 
 HeadersIterator::~HeadersIterator() = default;
 
+void HeadersIterator::initialize(JS::Realm& realm)
+{
+    Base::initialize(realm);
+    set_prototype(&Bindings::ensure_web_prototype<Bindings::HeadersIteratorPrototype>(realm, "HeadersIterator"));
+}
+
 void HeadersIterator::visit_edges(JS::Cell::Visitor& visitor)
 {
     Base::visit_edges(visitor);

Userland/Libraries/LibWeb/Fetch/HeadersIterator.h

@@ -22,6 +22,7 @@ public:
     JS::ThrowCompletionOr<JS::Object*> next();
 
 private:
+    virtual void initialize(JS::Realm&) override;
     virtual void visit_edges(JS::Cell::Visitor&) override;
 
     HeadersIterator(Headers const&, JS::Object::PropertyKind iteration_kind);

Userland/Libraries/LibWeb/Fetch/Request.cpp

@@ -25,11 +25,16 @@ Request::Request(JS::Realm& realm, JS::NonnullGCPtr<Infrastructure::Request> req
     : PlatformObject(realm)
     , m_request(request)
 {
-    set_prototype(&Bindings::cached_web_prototype(realm, "Request"));
 }
 
 Request::~Request() = default;
 
+void Request::initialize(JS::Realm& realm)
+{
+    Base::initialize(realm);
+    set_prototype(&Bindings::ensure_web_prototype<Bindings::RequestPrototype>(realm, "Request"));
+}
+
 void Request::visit_edges(Cell::Visitor& visitor)
 {
     Base::visit_edges(visitor);

Userland/Libraries/LibWeb/Fetch/Request.h

@@ -98,6 +98,7 @@ public:
 private:
     Request(JS::Realm&, JS::NonnullGCPtr<Infrastructure::Request>);
 
+    virtual void initialize(JS::Realm&) override;
     virtual void visit_edges(Cell::Visitor&) override;
 
     // https://fetch.spec.whatwg.org/#concept-request-request

Userland/Libraries/LibWeb/Fetch/Response.cpp

@@ -22,11 +22,16 @@ Response::Response(JS::Realm& realm, JS::NonnullGCPtr<Infrastructure::Response>
     : PlatformObject(realm)
     , m_response(response)
 {
-    set_prototype(&Bindings::cached_web_prototype(realm, "Response"));
 }
 
 Response::~Response() = default;
 
+void Response::initialize(JS::Realm& realm)
+{
+    Base::initialize(realm);
+    set_prototype(&Bindings::ensure_web_prototype<Bindings::ResponsePrototype>(realm, "Response"));
+}
+
 void Response::visit_edges(Cell::Visitor& visitor)
 {
     Base::visit_edges(visitor);

Userland/Libraries/LibWeb/Fetch/Response.h

@@ -62,6 +62,7 @@ public:
 private:
     Response(JS::Realm&, JS::NonnullGCPtr<Infrastructure::Response>);
 
+    virtual void initialize(JS::Realm&) override;
     virtual void visit_edges(Cell::Visitor&) override;
 
     WebIDL::ExceptionOr<void> initialize_response(ResponseInit const&, Optional<Infrastructure::BodyWithType> const&);