3 files changed, 6 insertions, 6 deletions
diff --git a/components/script/dom/testbinding.rs b/components/script/dom/testbinding.rs
index 13579d71330..372055483c7 100644
--- a/components/script/dom/testbinding.rs
+++ b/components/script/dom/testbinding.rs
@@ -613,8 +613,8 @@ impl TestBindingMethods for TestBinding {
         }
     }
 
-    fn AdvanceClock(&self, ms: i32) {
-        self.global().r().as_window().advance_animation_clock(ms);
+    fn AdvanceClock(&self, ms: i32, tick: bool) {
+        self.global().r().as_window().advance_animation_clock(ms, tick);
     }
 
     fn Panic(&self) { panic!("explicit panic from script") }
diff --git a/components/script/dom/webidls/TestBinding.webidl b/components/script/dom/webidls/TestBinding.webidl
index 9fc8a9e3bb6..9945f983ad7 100644
--- a/components/script/dom/webidls/TestBinding.webidl
+++ b/components/script/dom/webidls/TestBinding.webidl
@@ -439,7 +439,7 @@ interface TestBinding {
   [Pref="dom.testbinding.prefcontrolled.enabled"]
   const unsigned short prefControlledConstDisabled = 0;
   [Pref="layout.animations.test.enabled"]
-  void advanceClock(long millis);
+  void advanceClock(long millis, optional boolean forceLayoutTick = true);
 
   [Pref="dom.testbinding.prefcontrolled2.enabled"]
   readonly attribute boolean prefControlledAttributeEnabled;
diff --git a/components/script/dom/window.rs b/components/script/dom/window.rs
index c25c826b4ec..8aaa0adcde3 100644
--- a/components/script/dom/window.rs
+++ b/components/script/dom/window.rs
@@ -1074,9 +1074,9 @@ impl Window {
     }
 
     /// Advances the layout animation clock by `delta` milliseconds, and then
-    /// forces a reflow.
-    pub fn advance_animation_clock(&self, delta: i32) {
-        self.layout_chan.send(Msg::AdvanceClockMs(delta)).unwrap();
+    /// forces a reflow if `tick` is true.
+    pub fn advance_animation_clock(&self, delta: i32, tick: bool) {
+        self.layout_chan.send(Msg::AdvanceClockMs(delta, tick)).unwrap();
     }
 
     /// Reflows the page unconditionally if possible and not suppressed. This