api: Flatten and simplify Servo preferences (#34966)

Flatten and simplify Servo's preferences code. In addition, have both
preferences and options passed in as arguments to `Servo::new()` and
make sure not to use the globally set preferences in `servoshell` (as
much as possible now).

Instead of a complex procedural macro to generate preferences, just
expose a very simple derive macro that adds string based getters and
setters.

- All command-line parsing is moved to servoshell.
- There is no longer the concept of a missing preference.
- Preferences no longer have to be part of the resources bundle because
  they now have reasonable default values.
- servoshell specific preferences are no longer part of the preferences
  exposed by the Servo API.

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

1 files changed, 1 insertions, 1 deletions

diff --git a/components/script/timers.rs b/components/script/timers.rs
index 9999dac01d7..60b079ebcf8 100644
--- a/components/script/timers.rs
+++ b/components/script/timers.rs
@@ -237,7 +237,7 @@ impl OneshotTimers {
     }
 
     pub(crate) fn slow_down(&self) {
-        let min_duration_ms = pref!(js.timers.minimum_duration) as u64;
+        let min_duration_ms = pref!(js_timers_minimum_duration) as u64;
         self.js_timers
             .set_min_duration(Duration::from_millis(min_duration_ms));
     }