Roll src/third_party/perfetto a4c8d52b7313..a1178b9bda47 (4 commits)

https://android.googlesource.com/platform/external/perfetto.git/+log/a4c8d52b7313..a1178b9bda47

git log a4c8d52b7313..a1178b9bda47 --date=short --no-merges --format='%ad %ae %s'
2019-09-18 treehugger-gerrit@google.com Merge "ui: Reset pan/zoom acceleration when reversing direction"
2019-09-18 tneda@google.com Merge "perfetto-ui: Adding border over the clicked marker and hover state"
2019-09-18 fmayer@google.com Merge "Do not close FD while held by FILE*."
2019-09-18 hjd@google.com Merge "perfetto-ui: Pan down to search result"

Created with:
  gclient setdep -r src/third_party/perfetto@a1178b9bda47

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

TBR=perfetto-bugs@google.com

Bug: None
Change-Id: I48ca84b7e7aef43c6ddcd4f754b2f803f54e8f7a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1810460Reviewed-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@{#697565}

DEPS

@@ -1257,7 +1257,7 @@ deps = {
   },
 
   'src/third_party/perfetto':
-    Var('android_git') + '/platform/external/perfetto.git' + '@' + 'a4c8d52b7313c44abc0584fa081f575b5bdf85c2',
+    Var('android_git') + '/platform/external/perfetto.git' + '@' + 'a1178b9bda47d6dac9992cc8241e1b586c1853b4',
 
   'src/third_party/perl': {
       'url': Var('chromium_git') + '/chromium/deps/perl.git' + '@' + '6f3e5028eb65d0b4c5fdd792106ac4c84eee1eb3',