void FCEFBrowserApp::OnScheduleMessagePumpWork(int64 delay_ms)
{
    FScopeLock Lock(&MessagePumpCountdownCS);

    if (MessagePumpCountdown == -1)
    {
        MessagePumpCountdown = delay_ms;
    }
    else
    {
        // override if we need the pump to happen sooner
        MessagePumpCountdown = FMath::Clamp<int64>(MessagePumpCountdown, 0, delay_ms);
    }
}

// DeltaTime is a float, 1.0 = 1 second
void FCEFBrowserApp::TickMessagePump(float DeltaTime, bool bForce)
{
    FScopeLock Lock(&MessagePumpCountdownCS);

    bool bPump = false;
    // count down in order to call message pump
    if (MessagePumpCountdown >= 0)
    {
        MessagePumpCountdown -= DeltaTime * 1000;
        if (MessagePumpCountdown <= 0)
        {
            bPump = true;
        }
    }
    if (bPump || bForce)
    {
        // -1 indicates that no countdown is currently happening
        MessagePumpCountdown = -1;
        CefDoMessageLoopWork();
    }
}

// From main loop
// Tick and pass DeltaTime, force run if there are active browser windows
TickMessagePump(DeltaTime, WindowInterfaces.Num() > 0)