Roll Perfetto from 3ea2467b7947 to 7fa78b7965fb (3 revisions)

https://android.googlesource.com/platform/external/perfetto.git/+log/3ea2467b7947..7fa78b7965fb

2020-06-08 rslawik@google.com Merge "Detect main threads"
2020-06-08 lalitm@google.com Merge "metrics: fix registration on Windows"
2020-06-08 eseckler@google.com Merge "processor: Check for TrackEvent metadata events without name"

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: I2dd1437d59c096993d791cc54111835e3d541926
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2235637Reviewed-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@{#776050}

DEPS

@@ -1224,7 +1224,7 @@ deps = {
   },
 
   'src/third_party/perfetto':
-    Var('android_git') + '/platform/external/perfetto.git' + '@' + '3ea2467b79478c05f50426ca52d41f6fe85e718b',
+    Var('android_git') + '/platform/external/perfetto.git' + '@' + '7fa78b7965fbc607d2eefe3f150a5b532e46095e',
 
   'src/third_party/perl': {
       'url': Var('chromium_git') + '/chromium/deps/perl.git' + '@' + '6f3e5028eb65d0b4c5fdd792106ac4c84eee1eb3',