Roll src/third_party/perfetto a1e7b1c440e1..78f4835a7135 (2 commits)

https://android.googlesource.com/platform/external/perfetto.git/+log/a1e7b1c440e1..78f4835a7135


git log a1e7b1c440e1..78f4835a7135 --date=short --no-merges --format='%ad %ae %s'
2018-10-24 hjd@google.com Merge "protozero: Update hash unittest"
2018-10-24 hjd@google.com Merge "traced_probes: Common pids trigger process scanning"


Created with:
  gclient setdep -r src/third_party/perfetto@78f4835a7135

The AutoRoll server is located here: https://autoroll.skia.org/r/perfetto-chromium-autoroll

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff, who should
be CC'd on the roll, and stop the roller if necessary.


TBR=perfetto-bugs@google.com

Change-Id: I7cca52e2dee3490988d5296135f8c15d6a6c92a8
Reviewed-on: https://chromium-review.googlesource.com/c/1297336Reviewed-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@{#602308}

DEPS

@@ -1004,7 +1004,7 @@ deps = {
   },
 
   'src/third_party/perfetto':
-    Var('android_git') + '/platform/external/perfetto.git' + '@' +  'a1e7b1c440e16359b7be198109f25b9628e26017',
+    Var('android_git') + '/platform/external/perfetto.git' + '@' +  '78f4835a7135f700c092f7f66d26780b4f7e484a',
 
   'src/third_party/perl': {
       'url': Var('chromium_git') + '/chromium/deps/perl.git' + '@' + 'ac0d98b5cee6c024b0cffeb4f8f45b6fc5ccdb78',