Roll AFDO from 68.0.3438.0_rc-r1 to 68.0.3439.0_rc-r1

This CL may cause a small binary size increase, roughly proportional
to how long it's been since our last AFDO profile roll. For larger
increases (around or exceeding 100KB), please file a bug against
gbiv@chromium.org. Additional context: https://crbug.com/805539

The AutoRoll server is located here: https://afdo-chromium-roll.skia.org

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff, who should
be CC'd on the roll, and stop the roller if necessary.


TBR=gbiv@chromium.org

Change-Id: Ibb6a087acc07871e2f92fb16823fb9315bdd0098
Reviewed-on: https://chromium-review.googlesource.com/1071241Reviewed-by: afdo-chromium-autoroll <afdo-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Commit-Queue: afdo-chromium-autoroll <afdo-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#561430}

chrome/android/profiles/newest.txt

-chromeos-chrome-amd64-68.0.3438.0_rc-r1.afdo.bz2
\ No newline at end of file
+chromeos-chrome-amd64-68.0.3439.0_rc-r1.afdo.bz2
\ No newline at end of file