Fix pending_broker_clients handling am: 743df24d9d am: 7fd4f70940 am: 22d0600745 am: c23d2e6ce4

Original change: https://android-review.googlesource.com/c/platform/external/libchrome/+/1428189

Change-Id: Iae9f037e7a1c81e7e59cf3fd05d91a0414026cba