Bug 1381627 - EverySecondTelemetryCallback target r=billm,jib

MozReview-Commit-ID: 2noZLkM4ZjO

--HG--
extra : rebase_source : a5e022b083f7341c26e71314578ea9f0e9023818

media/webrtc/signaling/src/peerconnection/PeerConnectionCtx.cpp

@@ -368,7 +368,7 @@ nsresult PeerConnectionCtx::Initialize() {
 
   mTelemetryTimer = do_CreateInstance(NS_TIMER_CONTRACTID);
   MOZ_ASSERT(mTelemetryTimer);
-  nsresult rv = mTelemetryTimer->SetTarget(gMainThread);
+  nsresult rv = mTelemetryTimer->SetTarget(SystemGroup::EventTargetFor(TaskCategory::Other));
   NS_ENSURE_SUCCESS(rv, rv);
   mTelemetryTimer->InitWithNamedFuncCallback(EverySecondTelemetryCallback_m, this, 1000,
                                              nsITimer::TYPE_REPEATING_PRECISE_CAN_SKIP,