Make Runnable::handler take self by value.

With my thanks to kimundi and eddyb for their help in making this approach
work.

1 files changed, 2 insertions, 2 deletions

diff --git a/components/script/script_task.rs b/components/script/script_task.rs
index 4783d8539f4..46488446b9d 100644
--- a/components/script/script_task.rs
+++ b/components/script/script_task.rs
@@ -96,7 +96,7 @@ pub enum TimerSource {
 }
 
 pub trait Runnable {
-    fn handler(&self);
+    fn handler(self: Box<Self>);
 }
 
 /// Messages used to control script event loops, such as ScriptTask and
@@ -1385,7 +1385,7 @@ impl DocumentProgressHandler {
 }
 
 impl Runnable for DocumentProgressHandler {
-    fn handler(&self) {
+    fn handler(self: Box<DocumentProgressHandler>) {
         match self.task {
             DocumentProgressTask::DOMContentLoaded => {
                 self.dispatch_dom_content_loaded();