Roll Perfetto from b4e2a786fc30 to 509812647060 (4 revisions)

https://android.googlesource.com/platform/external/perfetto.git/+log/b4e2a786fc30..509812647060

2020-07-07 treehugger-gerrit@google.com Merge "Fix ASAN failure in clock tracker."
2020-07-07 treehugger-gerrit@google.com Merge "Migrate scroll_jank related tables to the 'chrome/scroll_jank.sql' metric"
2020-07-07 fmayer@google.com Remove unnecessarily standard-incompliant code.
2020-07-07 fmayer@google.com Merge "Add banner for import errors to UI."

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: Ib12d50535a4e032d07d49471d37541b628e533c4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2284945Reviewed-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@{#785813}

DEPS

@@ -1220,7 +1220,7 @@ deps = {
   },
 
   'src/third_party/perfetto':
-    Var('android_git') + '/platform/external/perfetto.git' + '@' + 'b4e2a786fc30fef0e69ea8bc34aaba11f9772663',
+    Var('android_git') + '/platform/external/perfetto.git' + '@' + '509812647060893522be508e0ab5b6c62dec03bd',
 
   'src/third_party/perl': {
       'url': Var('chromium_git') + '/chromium/deps/perl.git' + '@' + '6f3e5028eb65d0b4c5fdd792106ac4c84eee1eb3',