Originally posted in http://crbug.com/653249#c11

1. Open any webpage in a regular Chrome tab.
2. Using the AGSA Google app, search for a query and click on one of the search results to launch a custom tab.
3. Using the custom tabs client example app, "warmup" and "may launch" any url and then launch a custom tab.
4. Switch between the custom tabs or the Chrome tab via Recents.

Observed behavior:
The content in the custom tab flickers.

Expected behavior:
The content in the custom tab should not flash/flicker.

Important Notes:
- This seems to happen more reliably if "warmup" and "may launch" are called before launching the custom tab. For e.g, in repro step 3 above, if the tab is launched without "warmup" and "may launch", I wasn't able to repro the flickering consistently.
- I have added a video showing current behavior here: http://go/chrome-androidlogs1/6/653249 (Ignore the artifacts at the bottom of the video, but that seems to be a problem with screenrecord)

Device: Pixel XL / NMF26D