Roll Perfetto from fc1733482433 to 84cad4eea312 (2 revisions)

https://android.googlesource.com/platform/external/perfetto.git/+log/fc1733482433..84cad4eea312

2021-01-05 rsavitski@google.com Merge "Move using declaration into anon namespace."
2021-01-05 rsavitski@google.com Merge "Update stale link."

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: Ie3f61a6e0ff2be7e2018d17a8a338ae8e7831381
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2610610Reviewed-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@{#840089}

DEPS

@@ -1262,7 +1262,7 @@ deps = {
   },
 
   'src/third_party/perfetto':
-    Var('android_git') + '/platform/external/perfetto.git' + '@' + 'fc1733482433d326e316c74a374cda64db8b36f8',
+    Var('android_git') + '/platform/external/perfetto.git' + '@' + '84cad4eea312e789b1bf62a55fb77bf341b490a3',
 
   'src/third_party/perl': {
       'url': Var('chromium_git') + '/chromium/deps/perl.git' + '@' + '6f3e5028eb65d0b4c5fdd792106ac4c84eee1eb3',