Roll src/third_party/perfetto 6cbbaee824c4..8b1980c87d08 (2 commits)

https://android.googlesource.com/platform/external/perfetto.git/+log/6cbbaee824c4..8b1980c87d08

git log 6cbbaee824c4..8b1980c87d08 --date=short --first-parent --format='%ad %ae %s'
2019-11-28 ilkos@google.com Merge "Add statsd subscription id to trace metadata"
2019-11-28 ilkos@google.com Fix cost estimation for single row

Created with:
  gclient setdep -r src/third_party/perfetto@8b1980c87d08

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/+/master/autoroll/README.md

Bug: chromium:145338821
Tbr: perfetto-bugs@google.com
Change-Id: I41bcb3df478967c0a78a4bac3066c03c27580749
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1942032Reviewed-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@{#719965}

DEPS

@@ -1293,7 +1293,7 @@ deps = {
   },
 
   'src/third_party/perfetto':
-    Var('android_git') + '/platform/external/perfetto.git' + '@' + '6cbbaee824c4cae1ee867c6f897f56ff0db3b4db',
+    Var('android_git') + '/platform/external/perfetto.git' + '@' + '8b1980c87d082556f8a80086e2ef43e2bf575b7a',
 
   'src/third_party/perl': {
       'url': Var('chromium_git') + '/chromium/deps/perl.git' + '@' + '6f3e5028eb65d0b4c5fdd792106ac4c84eee1eb3',