Merge "Fix early firing when adding event listeners" into qt-dev

            const nsecs_t predictedReference = mReferenceTime + numPeriodsSinceReference * mPeriod;

            listener.mLastEventTime = predictedReference + mPhase + listener.mPhase;

            // If we're very close in time to the predicted last event time,

            // and we're not very close to the next predicted last event time

            // then we need to back up the last event time so that we can

            // attempt to fire an event immediately.

            //

            // Otherwise, keep the last event time that we predicted.

            if (isShorterThanPeriod(now - listener.mLastEventTime)) {

            // Otherwise, keep the last event time that we predicted so that

            // we don't wake up early.

            if (isShorterThanPeriod(now - listener.mLastEventTime) &&

                !isShorterThanPeriod(listener.mLastEventTime + mPeriod - now)) {

                listener.mLastEventTime -= mPeriod;

            }

        } else {