servo: Merge #16210 - Update rust-mozjs to master (from jdm:updatejs); r=Wafflespeanut

- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes fix #16152
- [X] There are tests for these changes

Source-Repo: https://github.com/servo/servo
Source-Revision: 2ebddca5921230eafc25acaa5bf47c10756f3e51

--HG--
extra : subtree_source : https%3A//hg.mozilla.org/projects/converted-servo-linear
extra : subtree_revision : de6f1ce0d879dbb173e8ae29b4d0572f3b1e278f

servo/Cargo.lock

@@ -1307,7 +1307,7 @@ dependencies = [
 [[package]]
 name = "js"
 version = "0.1.4"
-source = "git+https://github.com/servo/rust-mozjs#101c6b6b58e0b7c5ed1ef2b6b676a7497f90df2f"
+source = "git+https://github.com/servo/rust-mozjs#7f380abcbe02604cca5f28ff4175dff2a4f5555e"
 dependencies = [
  "cmake 0.1.22 (registry+https://github.com/rust-lang/crates.io-index)",
  "heapsize 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",

servo/components/script/script_runtime.rs

@@ -126,7 +126,7 @@ unsafe extern "C" fn enqueue_job(cx: *mut JSContext,
 #[allow(unsafe_code)]
 pub unsafe fn new_rt_and_cx() -> Runtime {
     LiveDOMReferences::initialize();
-    let runtime = Runtime::new();
+    let runtime = Runtime::new().unwrap();
 
     JS_AddExtraGCRootsTracer(runtime.rt(), Some(trace_rust_roots), ptr::null_mut());
     JS_AddExtraGCRootsTracer(runtime.rt(), Some(trace_refcounted_objects), ptr::null_mut());