Roll Perfetto from dd5f5806985f to 77f491d99399 (3 revisions)

https://android.googlesource.com/platform/external/perfetto.git/+log/dd5f5806985f..77f491d99399

2021-02-01 hjd@google.com Merge "ui: Reland upgrade mithril"
2021-02-01 hjd@google.com Merge "upkeep: Remove extra return statment and unused using decl"
2021-02-01 hjd@google.com Merge "upkeep: Use char overload of r?find() where possible"

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/perfetto-chromium-autoroll
Please CC perfetto-bugs@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.chromium.try:linux-perfetto-rel
Bug: None
Tbr: perfetto-bugs@google.com
Change-Id: I49fa23f66eada1ad67db83c07ba409920799d7c5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2663327


Reviewed-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@{#849097}