Roll Perfetto from c566c247eb76 to 6def748c92e9 (2 revisions)

https://android.googlesource.com/platform/external/perfetto.git/+log/c566c247eb76..6def748c92e9

2020-12-10 lalitm@google.com Merge "tp: use instants for binder events and fixed scoped"
2020-12-10 delphick@google.com Merge "metrics: Clean up actual_power_by_combined_rail_mode test"

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: I7f2c822c4884e9e1d7352bcff242140eb4bec80a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2585164Reviewed-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@{#835761}

DEPS

@@ -1290,7 +1290,7 @@ deps = {
   },
 
   'src/third_party/perfetto':
-    Var('android_git') + '/platform/external/perfetto.git' + '@' + 'c566c247eb76e1452fe6251df176b731f79342a9',
+    Var('android_git') + '/platform/external/perfetto.git' + '@' + '6def748c92e9d9b41250e8db22f3c56b67640c29',
 
   'src/third_party/perl': {
       'url': Var('chromium_git') + '/chromium/deps/perl.git' + '@' + '6f3e5028eb65d0b4c5fdd792106ac4c84eee1eb3',