From 719839b8822bcfb6fac3ea21ad427f1e7ae0da5e Mon Sep 17 00:00:00 2001
From: Kenneth Myhra <kennethmyhra@gmail.com>
Date: Tue, 14 Feb 2023 20:30:43 +0100
Subject: [PATCH] LibWeb: Make factory method of CSS::StyleSheetList fallible

---
 Userland/Libraries/LibWeb/CSS/StyleSheetList.cpp | 4 ++--
 Userland/Libraries/LibWeb/CSS/StyleSheetList.h   | 2 +-
 Userland/Libraries/LibWeb/DOM/Document.cpp       | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/Userland/Libraries/LibWeb/CSS/StyleSheetList.cpp b/Userland/Libraries/LibWeb/CSS/StyleSheetList.cpp
index a770b76307..b73ae1cc93 100644
--- a/Userland/Libraries/LibWeb/CSS/StyleSheetList.cpp
+++ b/Userland/Libraries/LibWeb/CSS/StyleSheetList.cpp
@@ -45,10 +45,10 @@ void StyleSheetList::remove_sheet(CSSStyleSheet& sheet)
     m_document.invalidate_style();
 }
 
-StyleSheetList* StyleSheetList::create(DOM::Document& document)
+WebIDL::ExceptionOr<JS::NonnullGCPtr<StyleSheetList>> StyleSheetList::create(DOM::Document& document)
 {
     auto& realm = document.realm();
-    return realm.heap().allocate<StyleSheetList>(realm, document).release_allocated_value_but_fixme_should_propagate_errors();
+    return MUST_OR_THROW_OOM(realm.heap().allocate<StyleSheetList>(realm, document));
 }
 
 StyleSheetList::StyleSheetList(DOM::Document& document)
diff --git a/Userland/Libraries/LibWeb/CSS/StyleSheetList.h b/Userland/Libraries/LibWeb/CSS/StyleSheetList.h
index b80226af15..05d661249e 100644
--- a/Userland/Libraries/LibWeb/CSS/StyleSheetList.h
+++ b/Userland/Libraries/LibWeb/CSS/StyleSheetList.h
@@ -15,7 +15,7 @@ class StyleSheetList : public Bindings::LegacyPlatformObject {
     WEB_PLATFORM_OBJECT(StyleSheetList, Bindings::LegacyPlatformObject);
 
 public:
-    static StyleSheetList* create(DOM::Document& document);
+    static WebIDL::ExceptionOr<JS::NonnullGCPtr<StyleSheetList>> create(DOM::Document& document);
 
     void add_sheet(CSSStyleSheet&);
     void remove_sheet(CSSStyleSheet&);
diff --git a/Userland/Libraries/LibWeb/DOM/Document.cpp b/Userland/Libraries/LibWeb/DOM/Document.cpp
index 2484426c2a..0a76876b07 100644
--- a/Userland/Libraries/LibWeb/DOM/Document.cpp
+++ b/Userland/Libraries/LibWeb/DOM/Document.cpp
@@ -2046,7 +2046,7 @@ void Document::set_window(Badge<HTML::BrowsingContext>, HTML::Window& window)
 CSS::StyleSheetList& Document::style_sheets()
 {
     if (!m_style_sheets)
-        m_style_sheets = CSS::StyleSheetList::create(*this);
+        m_style_sheets = CSS::StyleSheetList::create(*this).release_value_but_fixme_should_propagate_errors();
     return *m_style_sheets;
 }