Remove ref_filter_map dependency (#36857)

Instead, use the `filter_map` functions of `std::cell::Ref` and
`accountable_refcell::Ref`, which provide the same functionality as
`ref_filter_map`.

Testing: Refactoring for removing dependency. No extra test is needed.
Fixes: #36851

---------

Signed-off-by: Kingsley Yung <kingsley@kkoyung.dev>

components/script/dom/bindings/cell.rs

@@ -9,10 +9,8 @@ use std::cell::{BorrowError, BorrowMutError};
 pub(crate) use std::cell::{Ref, RefCell, RefMut};
 
 #[cfg(feature = "refcell_backtrace")]
-pub(crate) use accountable_refcell::{Ref, RefCell, RefMut, ref_filter_map};
+pub(crate) use accountable_refcell::{Ref, RefCell, RefMut};
 use malloc_size_of::{MallocConditionalSizeOf, MallocSizeOfOps};
-#[cfg(not(feature = "refcell_backtrace"))]
-pub(crate) use ref_filter_map::ref_filter_map;
 
 use crate::dom::bindings::root::{assert_in_layout, assert_in_script};
 

components/script/dom/element.rs

@@ -66,7 +66,7 @@ use xml5ever::serialize::TraversalScope::{
 use crate::conversions::Convert;
 use crate::dom::activation::Activatable;
 use crate::dom::attr::{Attr, AttrHelpersForLayout, is_relevant_attribute};
-use crate::dom::bindings::cell::{DomRefCell, Ref, RefMut, ref_filter_map};
+use crate::dom::bindings::cell::{DomRefCell, Ref, RefMut};
 use crate::dom::bindings::codegen::Bindings::AttrBinding::AttrMethods;
 use crate::dom::bindings::codegen::Bindings::DocumentBinding::DocumentMethods;
 use crate::dom::bindings::codegen::Bindings::ElementBinding::{
@@ -1480,7 +1480,7 @@ impl Element {
             // is "xmlns", and local name is prefix, or if prefix is null and it has an attribute
             // whose namespace is the XMLNS namespace, namespace prefix is null, and local name is
             // "xmlns", then return its value if it is not the empty string, and null otherwise."
-            let attr = ref_filter_map(self.attrs(), |attrs| {
+            let attr = Ref::filter_map(self.attrs(), |attrs| {
                 attrs.iter().find(|attr| {
                     if attr.namespace() != &ns!(xmlns) {
                         return false;
@@ -1493,7 +1493,8 @@ impl Element {
                         _ => false,
                     }
                 })
-            });
+            })
+            .ok();
 
             if let Some(attr) = attr {
                 return (**attr.value()).into();

components/script/dom/htmlcanvaselement.rs

@@ -31,7 +31,7 @@ pub(crate) use crate::canvas_context::*;
 use crate::conversions::Convert;
 use crate::dom::attr::Attr;
 use crate::dom::bindings::callback::ExceptionHandling;
-use crate::dom::bindings::cell::{DomRefCell, Ref, ref_filter_map};
+use crate::dom::bindings::cell::{DomRefCell, Ref};
 use crate::dom::bindings::codegen::Bindings::HTMLCanvasElementBinding::{
     BlobCallback, HTMLCanvasElementMethods, RenderingContext as RootedRenderingContext,
 };
@@ -225,7 +225,7 @@ impl LayoutHTMLCanvasElementHelpers for LayoutDom<'_, HTMLCanvasElement> {
 
 impl HTMLCanvasElement {
     pub(crate) fn context(&self) -> Option<Ref<RenderingContext>> {
-        ref_filter_map(self.context_mode.borrow(), |ctx| ctx.as_ref())
+        Ref::filter_map(self.context_mode.borrow(), |ctx| ctx.as_ref()).ok()
     }
 
     fn get_or_init_2d_context(&self, can_gc: CanGc) -> Option<DomRoot<CanvasRenderingContext2D>> {

components/script/dom/offscreencanvas.rs

@@ -10,7 +10,7 @@ use js::rust::{HandleObject, HandleValue};
 use snapshot::Snapshot;
 
 use crate::canvas_context::{CanvasContext, OffscreenRenderingContext};
-use crate::dom::bindings::cell::{DomRefCell, Ref, ref_filter_map};
+use crate::dom::bindings::cell::{DomRefCell, Ref};
 use crate::dom::bindings::codegen::Bindings::OffscreenCanvasBinding::{
     OffscreenCanvasMethods, OffscreenRenderingContext as RootedOffscreenRenderingContext,
 };
@@ -84,7 +84,7 @@ impl OffscreenCanvas {
     }
 
     pub(crate) fn context(&self) -> Option<Ref<OffscreenRenderingContext>> {
-        ref_filter_map(self.context.borrow(), |ctx| ctx.as_ref())
+        Ref::filter_map(self.context.borrow(), |ctx| ctx.as_ref()).ok()
     }
 
     pub(crate) fn get_image_data(&self) -> Option<Snapshot> {

components/script/dom/vertexarrayobject.rs

@@ -8,7 +8,7 @@ use canvas_traits::webgl::{
     ActiveAttribInfo, WebGLCommand, WebGLError, WebGLResult, WebGLVersion, WebGLVertexArrayId,
 };
 
-use crate::dom::bindings::cell::{DomRefCell, Ref, ref_filter_map};
+use crate::dom::bindings::cell::{DomRefCell, Ref};
 use crate::dom::bindings::codegen::Bindings::WebGL2RenderingContextBinding::WebGL2RenderingContextConstants as constants2;
 use crate::dom::bindings::codegen::Bindings::WebGLRenderingContextBinding::WebGLRenderingContextConstants as constants;
 use crate::dom::bindings::root::{Dom, MutNullableDom};
@@ -83,9 +83,10 @@ impl VertexArrayObject {
     }
 
     pub(crate) fn get_vertex_attrib(&self, index: u32) -> Option<Ref<VertexAttribData>> {
-        ref_filter_map(self.vertex_attribs.borrow(), |attribs| {
+        Ref::filter_map(self.vertex_attribs.borrow(), |attribs| {
             attribs.get(index as usize)
         })
+        .ok()
     }
 
     pub(crate) fn set_vertex_attrib_type(&self, index: u32, type_: u32) {