Bug 1514382 - Update webrender to commit fab59ceef070c11aba2a86c4ddf6ddc3c4e8f97d (WR PR #3417). r=kats

https://github.com/servo/webrender/pull/3417

Differential Revision: https://phabricator.services.mozilla.com/D14624

--HG--
extra : moz-landing-system : lando

gfx/webrender_bindings/revision.txt

@@ -1 +1 @@
-40aa1851b6453108d1c47a3264360362b9b2d053
+fab59ceef070c11aba2a86c4ddf6ddc3c4e8f97d

gfx/wr/webrender/src/clip.rs

@@ -696,6 +696,11 @@ impl ClipStore {
         })
     }
 
+    pub fn clear_old_instances(&mut self) {
+        self.clip_node_instances.clear();
+    }
+
+
     /// Walk the clip chain of a primitive, and calculate a minimal
     /// local clip rect for the primitive.
     #[allow(dead_code)]

gfx/wr/webrender/src/frame_builder.rs

@@ -407,6 +407,7 @@ impl FrameBuilder {
             scene_properties,
             Some(&mut transform_palette),
         );
+        self.clip_store.clear_old_instances();
 
         let mut render_tasks = RenderTaskTree::new(stamp.frame_id());
         let mut surfaces = Vec::new();