Bug 1280872 - Fix WasmLoop code to use RootedWasmInstanceObject. r=bbouvier

MozReview-Commit-ID: AX5iOFnG5KX

--HG--
extra : histedit_source : 8556b2b422c8d12143be256e3150aad5017c314a

js/src/shell/js.cpp

@@ -5222,8 +5222,8 @@ WasmLoop(JSContext* cx, unsigned argc, Value* vp)
             return false;
 
         Rooted<TypedArrayObject*> typedArray(cx, &ret->as<TypedArrayObject>());
-        RootedObject exportObj(cx);
-        if (!wasm::Eval(cx, typedArray, importObj, &exportObj)) {
+        RootedWasmInstanceObject instanceObj(cx);
+        if (!wasm::Eval(cx, typedArray, importObj, &instanceObj)) {
             // Clear any pending exceptions, we don't care about them
             cx->clearPendingException();
         }