am b716e570: Set the outbuf acquire fence after we actually have it.

            mFbProducerSlot, fbBuffer.get(),

            mOutputProducerSlot, outBuffer.get());

    // At this point we know the output buffer acquire fence,

    // so update HWC state with it.

    mHwc.setOutputBuffer(mDisplayId, mOutputFence, outBuffer);

    return mHwc.fbPost(mDisplayId, mFbFence, fbBuffer);

}

        return result;

    mOutputProducerSlot = mapSource2ProducerSlot(SOURCE_SINK, sslot);

    result = mHwc.setOutputBuffer(mDisplayId, mOutputFence,

    // On GLES-only frames, we don't have the right output buffer acquire fence

    // until after GLES calls queueBuffer(). So here we just set the buffer

    // (for use in HWC prepare) but not the fence; we'll call this again with

    // the proper fence once we have it.

    result = mHwc.setOutputBuffer(mDisplayId, Fence::NO_FENCE,

            mProducerBuffers[mOutputProducerSlot]);

    return result;