Roll src/third_party/perfetto 5450dc0a9c83..617f4eb4e5b7 (3 commits)

git log 5450dc0a9c83..617f4eb4e5b7 --date=short --no-merges --format='%ad %ae %s'
2019-02-27 Merge "Make Producer.CreateTraceWriter thread-safe"
2019-02-27 perfetto-ui: Unify track and track group borders
2019-02-27 perfetto-ui: Remove 'Tracks' header panel

Created with:
  gclient setdep -r src/third_party/perfetto@617f4eb4e5b7

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Change-Id: Ib53566536d684e1cde9a19a2e84717a1d7d732be
Reviewed-by: chromium-autoroll <>
Commit-Queue: chromium-autoroll <>
Cr-Commit-Position: refs/heads/master@{#636067}
1 file changed