Roll src/third_party/perfetto 1815c5422a39..8995c0468a44 (3 commits)

https://android.googlesource.com/platform/external/perfetto.git/+log/1815c5422a39..8995c0468a44

git log 1815c5422a39..8995c0468a44 --date=short --first-parent --format='%ad %ae %s'
2020-02-26 lalitm@google.com tp: fix test failure
2020-02-26 lalitm@google.com Merge "tp: fix android_cpu metric unit dimensionality"
2020-02-26 lalitm@google.com tp: allow empty end events from systrace print events

Created with:
  gclient setdep -r src/third_party/perfetto@8995c0468a44

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:149804989,chromium:150213213
Tbr: perfetto-bugs@google.com
Change-Id: I5d9e97898cfaca391c45dce4ec0d414a495067b7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2075359Reviewed-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@{#744754}

DEPS

@@ -1242,7 +1242,7 @@ deps = {
   },
 
   'src/third_party/perfetto':
-    Var('android_git') + '/platform/external/perfetto.git' + '@' + '1815c5422a39976e6253eed8f8648caeef58b738',
+    Var('android_git') + '/platform/external/perfetto.git' + '@' + '8995c0468a444545788291c7cdd7465768405c3c',
 
   'src/third_party/perl': {
       'url': Var('chromium_git') + '/chromium/deps/perl.git' + '@' + '6f3e5028eb65d0b4c5fdd792106ac4c84eee1eb3',