Create a `constellation_traits` crate (#36088)

This change creates a `constellation_traits` crate. Previously messages
to the `Constellation` were in the `compositing_traits` crate, which
came about organically. This change moves these to a new crate which
also contains data types that are used in both compositing/libservo and
script (ie types that cross the process boundary). The idea is similar
to `embedding_traits`, but this is meant for types not exposed to the
API.

This change allows deduplicating `UntrustedNodeAddress`, which
previously had two versions to avoid circular dependencies.

Signed-off-by: Martin Robinson <mrobinson@igalia.com>

1 files changed, 2 insertions, 3 deletions

diff --git a/components/layout_2020/display_list/mod.rs b/components/layout_2020/display_list/mod.rs
index 4ba62041099..bc5032148f3 100644
--- a/components/layout_2020/display_list/mod.rs
+++ b/components/layout_2020/display_list/mod.rs
@@ -7,6 +7,7 @@ use std::sync::Arc;
 
 use app_units::Au;
 use base::WebRenderEpochToU16;
+use base::id::ScrollTreeNodeId;
 use embedder_traits::Cursor;
 use euclid::{Point2D, SideOffsets2D, Size2D, UnknownUnit};
 use fonts::GlyphStore;
@@ -35,9 +36,7 @@ use webrender_api::{
     self as wr, BorderDetails, BoxShadowClipMode, ClipChainId, CommonItemProperties,
     ImageRendering, NinePatchBorder, NinePatchBorderSource, units,
 };
-use webrender_traits::display_list::{
-    AxesScrollSensitivity, CompositorDisplayListInfo, ScrollTreeNodeId,
-};
+use webrender_traits::display_list::{AxesScrollSensitivity, CompositorDisplayListInfo};
 use wr::units::LayoutVector2D;
 
 use crate::context::LayoutContext;