Roll src/third_party/perfetto 199b69092bef..12949bd7d3d6 (2 commits)

https://android.googlesource.com/platform/external/perfetto.git/+log/199b69092bef..12949bd7d3d6


git log 199b69092bef..12949bd7d3d6 --date=short --no-merges --format='%ad %ae %s'
2018-08-24 treehugger-gerrit@google.com Merge "Only start data sources on registration if the tracing session is enabled"
2018-08-24 primiano@google.com Merge "Update guard to use PERFETTO_BUILDFLAG"


Created with:
  gclient setdep -r src/third_party/perfetto@12949bd7d3d6

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

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: I7bfbac3f639655ef6b899d5cdc3f01d8ada70045
Reviewed-on: https://chromium-review.googlesource.com/1188362Reviewed-by: perfetto-chromium-autoroll <perfetto-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Commit-Queue: perfetto-chromium-autoroll <perfetto-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#585793}

DEPS

@@ -954,7 +954,7 @@ deps = {
   },
 
   'src/third_party/perfetto':
-    Var('android_git') + '/platform/external/perfetto.git' + '@' +  '199b69092befa5534bf488e3e4af9294adf8c346',
+    Var('android_git') + '/platform/external/perfetto.git' + '@' +  '12949bd7d3d6f4697426cba31df1aa32ef8a1f9e',
 
   'src/third_party/perl': {
       'url': Var('chromium_git') + '/chromium/deps/perl.git' + '@' + 'ac0d98b5cee6c024b0cffeb4f8f45b6fc5ccdb78',