Make #[derive(JSTraceable)] a procedural macro

components/script/Cargo.toml

@@ -42,6 +42,7 @@ hyper_serde = "0.1.4"
 image = "0.10"
 ipc-channel = "0.5"
 js = {git = "https://github.com/servo/rust-mozjs", features = ["promises"]}
+jstraceable_derive = {path = "../jstraceable_derive"}
 libc = "0.2"
 log = "0.3.5"
 mime = "0.2.1"

components/script/dom/validitystate.rs

@@ -10,7 +10,7 @@ use dom::element::Element;
 use dom::window::Window;
 
 // https://html.spec.whatwg.org/multipage/#validity-states
-#[derive_JSTraceable]
+#[derive(JSTraceable)]
 #[derive(HeapSizeOf)]
 pub enum ValidityStatus {
     ValueMissing,

components/script/lib.rs

@@ -54,6 +54,8 @@ extern crate image;
 extern crate ipc_channel;
 #[macro_use]
 extern crate js;
+#[macro_use]
+extern crate jstraceable_derive;
 extern crate libc;
 #[macro_use]
 extern crate log;