7f77f0177a
The hack here is to flush the timeline events so the host that waits for the 'Rasterized first useful frame' event won't hang. Previously 'Widgets built first useful frame' didn't cause this trouble because the GPU thread will naturally add more events later and cause a fresh. The `Rasterized...` event, however, is likely to be the last (or nearly the last) event during the app start up. rmacnak and I will figure out a better way to fix it next week. We're having this quick hack now to fix our device lab performance tests so we won't miss the data points.
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