Roll Perfetto from 16973d613fed to 2f47910c9ce3 (13 revisions)

https://android.googlesource.com/platform/external/perfetto.git/+log/16973d613fed..2f47910c9ce3

2020-11-20 treehugger-gerrit@google.com Merge "Slightly improve performance of ScopedSpinlock."
2020-11-20 fmayer@google.com Merge "Reuse existing build id strings."
2020-11-19 treehugger-gerrit@google.com Merge "Do not include header when test isn't run."
2020-11-19 treehugger-gerrit@google.com Merge "[docs] Add docs on debug slices"
2020-11-19 treehugger-gerrit@google.com Merge "consumer sdk: Handle tracing sessions without matching data sources"
2020-11-19 treehugger-gerrit@google.com Merge "service: Fix ALL_DATA_SOURCES_STARTED event without instances"
2020-11-19 treehugger-gerrit@google.com Merge "Do not run POSIX watchdog when watchdog is compiled out."
2020-11-19 hjd@google.com Merge "traced_probes: Parse printk formats ftrace fields"
2020-11-19 treehugger-gerrit@google.com Merge "Add unittest for ParseProcInfo."
2020-11-19 treehugger-gerrit@google.com Merge "metrics: Remove trace-categories from chrome_event_metadata"
2020-11-19 fmayer@google.com Merge "Do not churn AllocRecords."
2020-11-19 lalitm@google.com Merge "Add all platform files to symbolizer build"
2020-11-19 treehugger-gerrit@google.com Merge "Fix missing "AS" in metrics docs' query example"

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: Ife14e26373c1187307de14c906cff8351ec82550
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2552236Reviewed-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@{#829765}

DEPS

@@ -1291,7 +1291,7 @@ deps = {
   },
 
   'src/third_party/perfetto':
-    Var('android_git') + '/platform/external/perfetto.git' + '@' + '16973d613fed5c24d63bc4bf6cc9ffe267708ea5',
+    Var('android_git') + '/platform/external/perfetto.git' + '@' + '2f47910c9ce32bb4cca529a10f0ce3ea05871876',
 
   'src/third_party/perl': {
       'url': Var('chromium_git') + '/chromium/deps/perl.git' + '@' + '6f3e5028eb65d0b4c5fdd792106ac4c84eee1eb3',