Roll Chrome Win64 PGO Profile

Roll Chrome Win64 PGO profile from chrome-win64-master-1604534391-78c794948f9915d6943b9f032cad3893f5df2156.profdata to chrome-win64-master-1604545021-6b268e7944932acdec58448c2452d297c1502b9f.profdata

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/pgo-win64-chromium
Please CC pgo-profile-sheriffs@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

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

Cq-Include-Trybots: luci.chrome.try:win64-chrome
Tbr: pgo-profile-sheriffs@google.com
Change-Id: Ifea7029290e2cae57719714e79ec464fae98595a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2520452Reviewed-by: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#824346}

chrome/build/win64.pgo.txt

-chrome-win64-master-1604534391-78c794948f9915d6943b9f032cad3893f5df2156.profdata
+chrome-win64-master-1604545021-6b268e7944932acdec58448c2452d297c1502b9f.profdata