fix(ext): Add checks for owning properties in for-in loops (#17139)

In the for-in loops, there were a few places where we forgot to check if
objects owned some properties, so I added them.

1 files changed, 1 insertions, 1 deletions

diff --git a/ext/web/13_message_port.js b/ext/web/13_message_port.js
index 7ec8dc9f9..847daba26 100644
--- a/ext/web/13_message_port.js
+++ b/ext/web/13_message_port.js
@@ -231,7 +231,7 @@
       transferredArrayBuffers,
     });
 
-    for (const i in arrayBufferIdsInTransferables) {
+    for (let i = 0; i < arrayBufferIdsInTransferables.length; ++i) {
       const id = arrayBufferIdsInTransferables[i];
       transferables[id] = transferredArrayBuffers[i];
     }