LibWeb: Make factory method of HTML::CanvasRenderingContext2D fallible

Author: https://github.com/kennethmyhra
Commit: b7c488e51e
Pull-request: https://github.com/SerenityOS/serenity/pull/17491
Reviewed-by: https://github.com/linusg ✅

Userland/Libraries/LibWeb/HTML/HTMLCanvasElement.cpp

@@ -95,7 +95,7 @@ HTMLCanvasElement::HasOrCreatedContext HTMLCanvasElement::create_2d_context()
     if (!m_context.has<Empty>())
         return m_context.has<JS::NonnullGCPtr<CanvasRenderingContext2D>>() ? HasOrCreatedContext::Yes : HasOrCreatedContext::No;
 
-    m_context = CanvasRenderingContext2D::create(realm(), *this);
+    m_context = CanvasRenderingContext2D::create(realm(), *this).release_value_but_fixme_should_propagate_errors();
     return HasOrCreatedContext::Yes;
 }