Bug 1288564 - Baldr: change HeapPtr to ReadBarriered in WeakCache (r=terrence)

MozReview-Commit-ID: 722L1GFAo6c

--HG--
extra : rebase_source : 867c492d7114bad15414c6b671888f0ad263e478

js/src/jscompartment.h

@@ -517,8 +517,8 @@ struct JSCompartment
     mozilla::LinkedList<js::UnboxedLayout> unboxedLayouts;
 
     // All wasm live instances in the compartment.
-    using WasmInstanceObjectSet = js::GCHashSet<js::HeapPtr<js::WasmInstanceObject*>,
-                                                js::MovableCellHasher<js::HeapPtr<js::WasmInstanceObject*>>,
+    using WasmInstanceObjectSet = js::GCHashSet<js::ReadBarriered<js::WasmInstanceObject*>,
+                                                js::MovableCellHasher<js::ReadBarriered<js::WasmInstanceObject*>>,
                                                 js::SystemAllocPolicy>;
     JS::WeakCache<WasmInstanceObjectSet> wasmInstances;