From 735fdedbe9928f9cbd7863b5d4f171957b3c743e Mon Sep 17 00:00:00 2001
From: Simon Giesecke <sgiesecke@mozilla.com>
Date: Tue, 5 May 2020 09:09:01 +0000
Subject: [PATCH] style: Make NotNull move its member pointer where possible.

Differential Revision: https://phabricator.services.mozilla.com/D72827
---
 components/style/gecko_bindings/sugar/ownership.rs | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/components/style/gecko_bindings/sugar/ownership.rs b/components/style/gecko_bindings/sugar/ownership.rs
index 5170b7dbc5a..0ece222a1c4 100644
--- a/components/style/gecko_bindings/sugar/ownership.rs
+++ b/components/style/gecko_bindings/sugar/ownership.rs
@@ -9,6 +9,7 @@ use std::marker::PhantomData;
 use std::mem::{forget, transmute};
 use std::ops::{Deref, DerefMut};
 use std::ptr;
+use gecko_bindings::structs::root::mozilla::detail::CopyablePtr;
 
 /// Indicates that a given Servo type has a corresponding Gecko FFI type.
 pub unsafe trait HasFFI: Sized + 'static {
@@ -332,3 +333,16 @@ impl<GeckoType> OwnedOrNull<GeckoType> {
         unsafe { transmute(self) }
     }
 }
+
+impl<T> Deref for CopyablePtr<T> {
+    type Target = T;
+    fn deref(&self) -> &Self::Target {
+        &self.mPtr
+    }
+}
+
+impl<T> DerefMut for CopyablePtr<T> {
+    fn deref_mut<'a>(&'a mut self) -> &'a mut T {
+        &mut self.mPtr
+    }
+}
\ No newline at end of file