Roll src/third_party/perfetto 2da86adf0fb8..b5109d9f9628 (1 commits)

https://android.googlesource.com/platform/external/perfetto.git/+log/2da86adf0fb8..b5109d9f9628

git log 2da86adf0fb8..b5109d9f9628 --date=short --first-parent --format='%ad %ae %s'
2020-04-03 primiano@google.com Add ObservableEvent to wait for all data source started

Created with:
  gclient setdep -r src/third_party/perfetto@b5109d9f9628

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:141917389,chromium:150960749
Tbr: perfetto-bugs@google.com
Change-Id: I5b1c48993c074d1e34bccc992dd35f760d085ced
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2135588Reviewed-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@{#756211}

DEPS

@@ -1228,7 +1228,7 @@ deps = {
   },
 
   'src/third_party/perfetto':
-    Var('android_git') + '/platform/external/perfetto.git' + '@' + '2da86adf0fb8fd64ae2e7ac4cc9eb7b45772a79c',
+    Var('android_git') + '/platform/external/perfetto.git' + '@' + 'b5109d9f96286991015a8cdc60e6a60d8b15ae85',
 
   'src/third_party/perl': {
       'url': Var('chromium_git') + '/chromium/deps/perl.git' + '@' + '6f3e5028eb65d0b4c5fdd792106ac4c84eee1eb3',