Merge Perfetto rolls into M91 Branch

Roll Perfetto from f9a98e671095 to 73318603a7c5 (2 revisions)

https://android.googlesource.com/platform/external/perfetto.git/+log/f9a98e671095..73318603a7c5

2021-04-09 treehugger-gerrit@google.com Merge "Correctly import CompleteEvents with thread times."
2021-04-09 skyostil@google.com tracing: Fix visibility of TrackEventSessionObserver

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

(cherry picked from commit 94c331f)

Bug: 1197278,1198083
Change-Id: I0391614a7b00e4c8bd4f7dbad1130f6e255d611f
Tbr: perfetto-bugs@google.com
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Bot-Commit: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Original-Commit-Position: refs/heads/master@{#871037}
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2821795
Reviewed-by: Stephen Nusko <nuskos@chromium.org>
Reviewed-by: Eric Seckler <eseckler@chromium.org>
Auto-Submit: Stephen Nusko <nuskos@chromium.org>
Commit-Queue: Eric Seckler <eseckler@chromium.org>
Commit-Queue: Stephen Nusko <nuskos@chromium.org>
Cr-Commit-Position: refs/branch-heads/4472@{#34}
Cr-Branched-From: 3d60439-refs/heads/master@{#870763}

DEPS

@@ -1339,7 +1339,7 @@ deps = {
   },
 
   'src/third_party/perfetto':
-    Var('android_git') + '/platform/external/perfetto.git' + '@' + '47d6927909dcaeee748d90414eb6d6f340b17263',
+    Var('android_git') + '/platform/external/perfetto.git' + '@' + '73318603a7c527fd676963b6000c1ea3cb7ad855',
 
   'src/third_party/perl': {
       'url': Var('chromium_git') + '/chromium/deps/perl.git' + '@' + '6f3e5028eb65d0b4c5fdd792106ac4c84eee1eb3',