diff --git a/components/canvas/canvas_data.rs b/components/canvas/canvas_data.rs
index beb2abc5979..4a7959788fb 100644
--- a/components/canvas/canvas_data.rs
+++ b/components/canvas/canvas_data.rs
@@ -368,6 +368,7 @@ pub struct CanvasData<'a> {
     state: CanvasPaintState<'a>,
     saved_states: Vec<CanvasPaintState<'a>>,
     webrender_api: webrender_api::RenderApi,
+    webrender_doc: webrender_api::DocumentId,
     image_key: Option<webrender_api::ImageKey>,
     /// An old webrender image key that can be deleted when the next epoch ends.
     old_image_key: Option<webrender_api::ImageKey>,
@@ -384,6 +385,7 @@ impl<'a> CanvasData<'a> {
     pub fn new(
         size: Size2D<u64>,
         webrender_api_sender: webrender_api::RenderApiSender,
+        webrender_doc: webrender_api::DocumentId,
         antialias: AntialiasMode,
         canvas_id: CanvasId,
     ) -> CanvasData<'a> {
@@ -397,6 +399,7 @@ impl<'a> CanvasData<'a> {
             state: CanvasPaintState::new(antialias),
             saved_states: vec![],
             webrender_api: webrender_api,
+            webrender_doc,
             image_key: None,
             old_image_key: None,
             very_old_image_key: None,
@@ -996,7 +999,7 @@ impl<'a> CanvasData<'a> {
             txn.delete_image(image_key);
         }
 
-        self.webrender_api.update_resources(txn.resource_updates);
+        self.webrender_api.send_transaction(self.webrender_doc, txn);
 
         let data = CanvasImageData {
             image_key: self.image_key.unwrap(),
@@ -1116,7 +1119,7 @@ impl<'a> Drop for CanvasData<'a> {
             txn.delete_image(image_key);
         }
 
-        self.webrender_api.update_resources(txn.resource_updates);
+        self.webrender_api.send_transaction(self.webrender_doc, txn);
     }
 }
 
diff --git a/components/canvas/canvas_paint_thread.rs b/components/canvas/canvas_paint_thread.rs
index c68e11f745a..f73d8f7b9a8 100644
--- a/components/canvas/canvas_paint_thread.rs
+++ b/components/canvas/canvas_paint_thread.rs
@@ -75,11 +75,13 @@ impl<'a> CanvasPaintThread<'a> {
                                     id_sender: creator,
                                     size,
                                     webrender_sender: webrenderer_api_sender,
+                                    webrender_doc,
                                     antialias
                                 }) => {
                                     let canvas_id = canvas_paint_thread.create_canvas(
                                         size,
                                         webrenderer_api_sender,
+                                        webrender_doc,
                                         antialias,
                                     );
                                     creator.send(canvas_id).unwrap();
@@ -103,6 +105,7 @@ impl<'a> CanvasPaintThread<'a> {
         &mut self,
         size: Size2D<u64>,
         webrender_api_sender: webrender_api::RenderApiSender,
+        webrender_doc: webrender_api::DocumentId,
         antialias: bool,
     ) -> CanvasId {
         let antialias = if antialias {
@@ -114,7 +117,13 @@ impl<'a> CanvasPaintThread<'a> {
         let canvas_id = self.next_canvas_id.clone();
         self.next_canvas_id.0 += 1;
 
-        let canvas_data = CanvasData::new(size, webrender_api_sender, antialias, canvas_id.clone());
+        let canvas_data = CanvasData::new(
+            size,
+            webrender_api_sender,
+            webrender_doc,
+            antialias,
+            canvas_id.clone(),
+        );
         self.canvases.insert(canvas_id.clone(), canvas_data);
 
         canvas_id
diff --git a/components/canvas/webgl_mode/inprocess.rs b/components/canvas/webgl_mode/inprocess.rs
index ff744481770..97275dc19ab 100644
--- a/components/canvas/webgl_mode/inprocess.rs
+++ b/components/canvas/webgl_mode/inprocess.rs
@@ -40,6 +40,7 @@ impl WebGLComm {
         surfman: WebrenderSurfman,
         webrender_gl: Rc<dyn gleam::gl::Gl>,
         webrender_api_sender: webrender_api::RenderApiSender,
+        webrender_doc: webrender_api::DocumentId,
         external_images: Arc<Mutex<WebrenderExternalImageRegistry>>,
         api_type: GlType,
     ) -> WebGLComm {
@@ -53,6 +54,7 @@ impl WebGLComm {
         // This implementation creates a single `WebGLThread` for all the pipelines.
         let init = WebGLThreadInit {
             webrender_api_sender,
+            webrender_doc,
             external_images,
             sender: sender.clone(),
             receiver,
diff --git a/components/canvas/webgl_thread.rs b/components/canvas/webgl_thread.rs
index a8abd36a3c9..9b7b4ed4683 100644
--- a/components/canvas/webgl_thread.rs
+++ b/components/canvas/webgl_thread.rs
@@ -221,6 +221,7 @@ pub(crate) struct WebGLThread {
     device: Device,
     /// Channel used to generate/update or delete `webrender_api::ImageKey`s.
     webrender_api: webrender_api::RenderApi,
+    webrender_doc: webrender_api::DocumentId,
     /// Map of live WebGLContexts.
     contexts: FnvHashMap<WebGLContextId, GLContextData>,
     /// Cached information for WebGLContexts.
@@ -257,6 +258,7 @@ pub type SurfaceProvider = Box<dyn surfman_chains::SurfaceProvider<Device> + Sen
 pub(crate) struct WebGLThreadInit {
     pub webxr_surface_providers: SurfaceProviders,
     pub webrender_api_sender: webrender_api::RenderApiSender,
+    pub webrender_doc: webrender_api::DocumentId,
     pub external_images: Arc<Mutex<WebrenderExternalImageRegistry>>,
     pub sender: WebGLSender<WebGLMsg>,
     pub receiver: WebGLReceiver<WebGLMsg>,
@@ -276,6 +278,7 @@ impl WebGLThread {
     pub(crate) fn new(
         WebGLThreadInit {
             webrender_api_sender,
+            webrender_doc,
             external_images,
             sender,
             receiver,
@@ -293,6 +296,7 @@ impl WebGLThread {
                 .create_device(&adapter)
                 .expect("Couldn't open WebGL device!"),
             webrender_api: webrender_api_sender.create_api(),
+            webrender_doc,
             contexts: Default::default(),
             cached_context_info: Default::default(),
             bound_context_id: None,
@@ -652,6 +656,7 @@ impl WebGLThread {
 
         let image_key = Self::create_wr_external_image(
             &self.webrender_api,
+            self.webrender_doc,
             size.to_i32(),
             has_alpha,
             id,
@@ -714,6 +719,7 @@ impl WebGLThread {
         let texture_target = current_wr_texture_target(&self.device);
         Self::update_wr_external_image(
             &self.webrender_api,
+            self.webrender_doc,
             size.to_i32(),
             has_alpha,
             context_id,
@@ -732,7 +738,7 @@ impl WebGLThread {
         if let Some(info) = self.cached_context_info.remove(&context_id) {
             let mut txn = webrender_api::Transaction::new();
             txn.delete_image(info.image_key);
-            self.webrender_api.update_resources(txn.resource_updates)
+            self.webrender_api.send_transaction(self.webrender_doc, txn)
         }
 
         // We need to make the context current so its resources can be disposed of.
@@ -1016,6 +1022,7 @@ impl WebGLThread {
     /// Creates a `webrender_api::ImageKey` that uses shared textures.
     fn create_wr_external_image(
         webrender_api: &webrender_api::RenderApi,
+        webrender_doc: webrender_api::DocumentId,
         size: Size2D<i32>,
         alpha: bool,
         context_id: WebGLContextId,
@@ -1027,7 +1034,7 @@ impl WebGLThread {
         let image_key = webrender_api.generate_image_key();
         let mut txn = webrender_api::Transaction::new();
         txn.add_image(image_key, descriptor, data, None);
-        webrender_api.update_resources(txn.resource_updates);
+        webrender_api.send_transaction(webrender_doc, txn);
 
         image_key
     }
@@ -1035,6 +1042,7 @@ impl WebGLThread {
     /// Updates a `webrender_api::ImageKey` that uses shared textures.
     fn update_wr_external_image(
         webrender_api: &webrender_api::RenderApi,
+        webrender_doc: webrender_api::DocumentId,
         size: Size2D<i32>,
         alpha: bool,
         context_id: WebGLContextId,
@@ -1046,7 +1054,7 @@ impl WebGLThread {
 
         let mut txn = webrender_api::Transaction::new();
         txn.update_image(image_key, descriptor, data, &webrender_api::DirtyRect::All);
-        webrender_api.update_resources(txn.resource_updates);
+        webrender_api.send_transaction(webrender_doc, txn);
     }
 
     /// Helper function to create a `webrender_api::ImageDescriptor`.
diff --git a/components/canvas_traits/lib.rs b/components/canvas_traits/lib.rs
index d7d893b2b32..ec510e6281d 100644
--- a/components/canvas_traits/lib.rs
+++ b/components/canvas_traits/lib.rs
@@ -27,6 +27,7 @@ pub enum ConstellationCanvasMsg {
         id_sender: Sender<CanvasId>,
         size: Size2D<u64>,
         webrender_sender: webrender_api::RenderApiSender,
+        webrender_doc: webrender_api::DocumentId,
         antialias: bool,
     },
     Exit,
diff --git a/components/constellation/constellation.rs b/components/constellation/constellation.rs
index 00dcd2a4eb8..69af3482997 100644
--- a/components/constellation/constellation.rs
+++ b/components/constellation/constellation.rs
@@ -738,6 +738,7 @@ enum WebrenderMsg {
 fn handle_webrender_message(
     pending_wr_frame: &AtomicBool,
     webrender_api: &webrender_api::RenderApi,
+    webrender_doc: webrender_api::DocumentId,
     msg: WebrenderMsg,
 ) {
     match msg {
@@ -810,9 +811,26 @@ fn handle_webrender_message(
             let _ = sender.send(webrender_api.generate_image_key());
         },
 
-        WebrenderMsg::Layout(script_traits::WebrenderMsg::UpdateResources(updates)) |
-        WebrenderMsg::Net(net_traits::WebrenderImageMsg::UpdateResources(updates)) => {
-            webrender_api.update_resources(updates);
+        WebrenderMsg::Layout(script_traits::WebrenderMsg::UpdateImages(updates)) => {
+            let mut txn = webrender_api::Transaction::new();
+            for update in updates {
+                match update {
+                    script_traits::ImageUpdate::AddImage(key, desc, data) => {
+                        txn.add_image(key, desc, data, None)
+                    },
+                    script_traits::ImageUpdate::DeleteImage(key) => txn.delete_image(key),
+                    script_traits::ImageUpdate::UpdateImage(key, desc, data) => {
+                        txn.update_image(key, desc, data, &webrender_api::DirtyRect::All)
+                    },
+                }
+            }
+            webrender_api.send_transaction(webrender_doc, txn);
+        },
+
+        WebrenderMsg::Net(net_traits::WebrenderImageMsg::AddImage(key, desc, data)) => {
+            let mut txn = webrender_api::Transaction::new();
+            txn.add_image(key, desc, data, None);
+            webrender_api.send_transaction(webrender_doc, txn);
         },
     }
 }
@@ -916,6 +934,7 @@ where
                     ipc::channel().expect("ipc channel failure");
 
                 let webrender_api = state.webrender_api_sender.create_api();
+                let webrender_doc = state.webrender_document;
                 let pending_wr_frame_clone = state.pending_wr_frame.clone();
                 ROUTER.add_route(
                     webrender_ipc_receiver.to_opaque(),
@@ -923,6 +942,7 @@ where
                         handle_webrender_message(
                             &pending_wr_frame_clone,
                             &webrender_api,
+                            webrender_doc,
                             WebrenderMsg::Layout(message.to().expect("conversion failure")),
                         )
                     }),
@@ -936,6 +956,7 @@ where
                         handle_webrender_message(
                             &pending_wr_frame_clone,
                             &webrender_api,
+                            webrender_doc,
                             WebrenderMsg::Net(message.to().expect("conversion failure")),
                         )
                     }),
@@ -4354,6 +4375,7 @@ where
             id_sender: canvas_id_sender,
             size,
             webrender_sender: webrender_api,
+            webrender_doc: self.webrender_document,
             antialias: self.enable_canvas_antialiasing,
         }) {
             return warn!("Create canvas paint thread failed ({})", e);
diff --git a/components/gfx/font_cache_thread.rs b/components/gfx/font_cache_thread.rs
index ecd11aa2146..48d4c9e2889 100644
--- a/components/gfx/font_cache_thread.rs
+++ b/components/gfx/font_cache_thread.rs
@@ -137,6 +137,7 @@ struct FontCache {
     core_resource_thread: CoreResourceThread,
     webrender_api: webrender_api::RenderApi,
     webrender_fonts: HashMap<Atom, webrender_api::FontKey>,
+    webrender_doc: webrender_api::DocumentId,
     font_instances: HashMap<(webrender_api::FontKey, Au), webrender_api::FontInstanceKey>,
 }
 
@@ -180,6 +181,7 @@ impl FontCache {
                 },
                 Command::GetFontInstance(font_key, size, result) => {
                     let webrender_api = &self.webrender_api;
+                    let doc = self.webrender_doc;
 
                     let instance_key =
                         *self
@@ -189,7 +191,7 @@ impl FontCache {
                                 let key = webrender_api.generate_font_instance_key();
                                 let mut txn = webrender_api::Transaction::new();
                                 txn.add_font_instance(key, font_key, size, None, None, Vec::new());
-                                webrender_api.update_resources(txn.resource_updates);
+                                webrender_api.send_transaction(doc, txn);
                                 key
                             });
 
@@ -389,6 +391,7 @@ impl FontCache {
 
     fn get_font_template_info(&mut self, template: Arc<FontTemplateData>) -> FontTemplateInfo {
         let webrender_api = &self.webrender_api;
+        let doc = self.webrender_doc;
         let webrender_fonts = &mut self.webrender_fonts;
 
         let font_key = *webrender_fonts
@@ -401,7 +404,7 @@ impl FontCache {
                     (None, Some(native_font)) => txn.add_native_font(font_key, native_font),
                     (None, None) => txn.add_raw_font(font_key, template.bytes(), 0),
                 }
-                webrender_api.update_resources(txn.resource_updates);
+                webrender_api.send_transaction(doc, txn);
                 font_key
             });
 
@@ -442,6 +445,7 @@ impl FontCacheThread {
     pub fn new(
         core_resource_thread: CoreResourceThread,
         webrender_api: webrender_api::RenderApi,
+        webrender_doc: webrender_api::DocumentId,
     ) -> FontCacheThread {
         let (chan, port) = ipc::channel().unwrap();
 
@@ -461,6 +465,7 @@ impl FontCacheThread {
                     font_context: FontContextHandle::new(),
                     core_resource_thread,
                     webrender_api,
+                    webrender_doc,
                     webrender_fonts: HashMap::new(),
                     font_instances: HashMap::new(),
                 };
diff --git a/components/layout_2020/display_list/mod.rs b/components/layout_2020/display_list/mod.rs
index c39387fbdaf..3e0019ea42e 100644
--- a/components/layout_2020/display_list/mod.rs
+++ b/components/layout_2020/display_list/mod.rs
@@ -342,7 +342,9 @@ impl<'a> BuilderForBoxFragment<'a> {
             //  value associated with the bottom-most background image layer.”
             let layer_index = b.background_image.0.len() - 1;
             let (bounds, common) = background::painting_area(self, builder, layer_index);
-            builder.wr.push_rect(&common, bounds, rgba(background_color))
+            builder
+                .wr
+                .push_rect(&common, bounds, rgba(background_color))
         }
         // Reverse because the property is top layer first, we want to paint bottom layer first.
         for (index, image) in b.background_image.0.iter().enumerate().rev() {
diff --git a/components/net/image_cache.rs b/components/net/image_cache.rs
index 8a5e6a53749..450653b341f 100644
--- a/components/net/image_cache.rs
+++ b/components/net/image_cache.rs
@@ -86,9 +86,7 @@ fn set_webrender_image_key(webrender_api: &WebrenderIpcSender, image: &mut Image
     };
     let data = webrender_api::ImageData::new(bytes);
     let image_key = webrender_api.generate_image_key();
-    let mut txn = webrender_api::Transaction::new();
-    txn.add_image(image_key, descriptor, data, None);
-    webrender_api.update_resources(txn.resource_updates);
+    webrender_api.add_image(image_key, descriptor, data);
     image.id = Some(image_key);
 }
 
diff --git a/components/net_traits/lib.rs b/components/net_traits/lib.rs
index 8bb1ad91cae..3222daceff0 100644
--- a/components/net_traits/lib.rs
+++ b/components/net_traits/lib.rs
@@ -32,7 +32,7 @@ use mime::Mime;
 use msg::constellation_msg::HistoryStateId;
 use servo_url::{ImmutableOrigin, ServoUrl};
 use time::precise_time_ns;
-use webrender_api::ImageKey;
+use webrender_api::{ImageData, ImageDescriptor, ImageKey};
 
 pub mod blob_url_store;
 pub mod filemanager_thread;
@@ -777,7 +777,7 @@ pub fn http_percent_encode(bytes: &[u8]) -> String {
 
 #[derive(Deserialize, Serialize)]
 pub enum WebrenderImageMsg {
-    UpdateResources(Vec<webrender_api::ResourceUpdate>),
+    AddImage(ImageKey, ImageDescriptor, ImageData),
     GenerateImageKey(IpcSender<ImageKey>),
 }
 
@@ -797,8 +797,11 @@ impl WebrenderIpcSender {
         receiver.recv().expect("error receiving image key result")
     }
 
-    pub fn update_resources(&self, updates: Vec<webrender_api::ResourceUpdate>) {
-        if let Err(e) = self.0.send(WebrenderImageMsg::UpdateResources(updates)) {
+    pub fn add_image(&self, key: ImageKey, descriptor: ImageDescriptor, data: ImageData) {
+        if let Err(e) = self
+            .0
+            .send(WebrenderImageMsg::AddImage(key, descriptor, data))
+        {
             warn!("Error sending image update: {}", e);
         }
     }
diff --git a/components/script/dom/htmlmediaelement.rs b/components/script/dom/htmlmediaelement.rs
index a1a1d3204fb..0bcf2f45d0f 100644
--- a/components/script/dom/htmlmediaelement.rs
+++ b/components/script/dom/htmlmediaelement.rs
@@ -81,7 +81,7 @@ use net_traits::request::{Destination, Referrer};
 use net_traits::{CoreResourceMsg, FetchChannels, FetchMetadata, FetchResponseListener, Metadata};
 use net_traits::{NetworkError, ResourceFetchTiming, ResourceTimingType};
 use script_layout_interface::HTMLMediaData;
-use script_traits::WebrenderIpcSender;
+use script_traits::{ImageUpdate, WebrenderIpcSender};
 use servo_config::pref;
 use servo_media::player::audio::AudioRenderer;
 use servo_media::player::video::{VideoFrame, VideoFrameRenderer};
@@ -95,9 +95,9 @@ use std::mem;
 use std::rc::Rc;
 use std::sync::{Arc, Mutex};
 use time::{self, Duration, Timespec};
+use webrender_api::ImageKey;
 use webrender_api::{ExternalImageData, ExternalImageId, ExternalImageType, TextureTarget};
 use webrender_api::{ImageData, ImageDescriptor, ImageDescriptorFlags, ImageFormat};
-use webrender_api::{ImageKey, Transaction};
 
 #[derive(PartialEq)]
 enum FrameStatus {
@@ -177,10 +177,10 @@ impl MediaFrameRenderer {
 
 impl VideoFrameRenderer for MediaFrameRenderer {
     fn render(&mut self, frame: VideoFrame) {
-        let mut txn = Transaction::new();
+        let mut updates = vec![];
 
         if let Some(old_image_key) = mem::replace(&mut self.very_old_frame, self.old_frame.take()) {
-            txn.delete_image(old_image_key);
+            updates.push(ImageUpdate::DeleteImage(old_image_key));
         }
 
         let descriptor = ImageDescriptor::new(
@@ -195,12 +195,11 @@ impl VideoFrameRenderer for MediaFrameRenderer {
                 if *width == frame.get_width() && *height == frame.get_height() =>
             {
                 if !frame.is_gl_texture() {
-                    txn.update_image(
+                    updates.push(ImageUpdate::UpdateImage(
                         *image_key,
                         descriptor,
                         ImageData::Raw(frame.get_data()),
-                        &webrender_api::DirtyRect::All,
-                    );
+                    ));
                 }
 
                 self.current_frame_holder
@@ -208,7 +207,7 @@ impl VideoFrameRenderer for MediaFrameRenderer {
                     .set(frame);
 
                 if let Some(old_image_key) = self.old_frame.take() {
-                    txn.delete_image(old_image_key);
+                    updates.push(ImageUpdate::DeleteImage(old_image_key));
                 }
             }
             Some((ref mut image_key, ref mut width, ref mut height)) => {
@@ -241,7 +240,7 @@ impl VideoFrameRenderer for MediaFrameRenderer {
                     .get_or_insert_with(|| FrameHolder::new(frame.clone()))
                     .set(frame);
 
-                txn.add_image(new_image_key, descriptor, image_data, None);
+                updates.push(ImageUpdate::AddImage(new_image_key, descriptor, image_data));
             },
             None => {
                 let image_key = self.api.generate_image_key();
@@ -265,10 +264,10 @@ impl VideoFrameRenderer for MediaFrameRenderer {
 
                 self.current_frame_holder = Some(FrameHolder::new(frame));
 
-                txn.add_image(image_key, descriptor, image_data, None);
+                updates.push(ImageUpdate::AddImage(image_key, descriptor, image_data));
             },
         }
-        self.api.update_resources(txn.resource_updates);
+        self.api.update_images(updates);
     }
 }
 
diff --git a/components/script_traits/lib.rs b/components/script_traits/lib.rs
index aeac1ff6087..b2a3de56796 100644
--- a/components/script_traits/lib.rs
+++ b/components/script_traits/lib.rs
@@ -69,8 +69,11 @@ use style_traits::SpeculativePainter;
 use webrender_api::units::{
     DeviceIntSize, DevicePixel, LayoutPixel, LayoutPoint, LayoutSize, WorldPoint,
 };
-use webrender_api::{BuiltDisplayList, DocumentId, ExternalScrollId, ImageKey, ScrollClamping};
-use webrender_api::{BuiltDisplayListDescriptor, HitTestFlags, HitTestResult, ResourceUpdate};
+use webrender_api::{
+    BuiltDisplayList, DocumentId, ExternalScrollId, ImageData, ImageDescriptor, ImageKey,
+    ScrollClamping,
+};
+use webrender_api::{BuiltDisplayListDescriptor, HitTestFlags, HitTestResult};
 
 pub use crate::script_msg::{
     DOMMessage, HistoryEntryReplacement, SWManagerMsg, SWManagerSenders, ScopeThings,
@@ -1173,7 +1176,7 @@ pub enum WebrenderMsg {
     /// provided channel sender.
     GenerateImageKey(IpcSender<ImageKey>),
     /// Perform a resource update operation.
-    UpdateResources(Vec<ResourceUpdate>),
+    UpdateImages(Vec<ImageUpdate>),
 }
 
 #[derive(Clone, Deserialize, Serialize)]
@@ -1265,9 +1268,20 @@ impl WebrenderIpcSender {
     }
 
     /// Perform a resource update operation.
-    pub fn update_resources(&self, updates: Vec<ResourceUpdate>) {
-        if let Err(e) = self.0.send(WebrenderMsg::UpdateResources(updates)) {
-            warn!("error sending resource updates: {}", e);
+    pub fn update_images(&self, updates: Vec<ImageUpdate>) {
+        if let Err(e) = self.0.send(WebrenderMsg::UpdateImages(updates)) {
+            warn!("error sending image updates: {}", e);
         }
     }
 }
+
+#[derive(Deserialize, Serialize)]
+/// Serializable image updates that must be performed by WebRender.
+pub enum ImageUpdate {
+    /// Register a new image.
+    AddImage(ImageKey, ImageDescriptor, ImageData),
+    /// Delete a previously registered image registration.
+    DeleteImage(ImageKey),
+    /// Update an existing image registration.
+    UpdateImage(ImageKey, ImageDescriptor, ImageData),
+}
diff --git a/components/servo/lib.rs b/components/servo/lib.rs
index 1d362fb2fa4..3da59234690 100644
--- a/components/servo/lib.rs
+++ b/components/servo/lib.rs
@@ -456,6 +456,7 @@ where
             webrender_gl.clone(),
             &mut webrender,
             webrender_api_sender.clone(),
+            webrender_document,
             &mut webxr_main_thread,
             &mut external_image_handlers,
             external_images.clone(),
@@ -882,6 +883,7 @@ fn create_constellation(
     let font_cache_thread = FontCacheThread::new(
         public_resource_threads.sender(),
         webrender_api_sender.create_api(),
+        webrender_document,
     );
 
     let initial_state = InitialConstellationState {
@@ -1043,6 +1045,7 @@ fn create_webgl_threads(
     webrender_gl: Rc<dyn gl::Gl>,
     webrender: &mut webrender::Renderer,
     webrender_api_sender: webrender_api::RenderApiSender,
+    webrender_doc: webrender_api::DocumentId,
     webxr_main_thread: &mut webxr::MainThreadRegistry,
     external_image_handlers: &mut WebrenderExternalImageHandlers,
     external_images: Arc<Mutex<WebrenderExternalImageRegistry>>,
@@ -1066,6 +1069,7 @@ fn create_webgl_threads(
         webrender_surfman,
         webrender_gl,
         webrender_api_sender,
+        webrender_doc,
         external_images,
         gl_type,
     );
diff --git a/tests/wpt/metadata/css/css-transforms/transform-input-012.html.ini b/tests/wpt/metadata/css/css-transforms/transform-input-012.html.ini
index ed9389b2c24..4643ad53102 100644
--- a/tests/wpt/metadata/css/css-transforms/transform-input-012.html.ini
+++ b/tests/wpt/metadata/css/css-transforms/transform-input-012.html.ini
@@ -1,4 +1,3 @@
 [transform-input-012.html]
   bug: https://github.com/servo/servo/issues/21092
-  expected:
-    if os == "linux": FAIL
+  expected: FAIL
diff --git a/tests/wpt/metadata/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-transform-translatez.html.ini b/tests/wpt/metadata/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-transform-translatez.html.ini
index 068320fb597..8f2209ffd03 100644
--- a/tests/wpt/metadata/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-transform-translatez.html.ini
+++ b/tests/wpt/metadata/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-transform-translatez.html.ini
@@ -1,2 +1,3 @@
 [fieldset-transform-translatez.html]
-  expected: FAIL
+  expected:
+    if os == "linux": FAIL