[perf] Search further back for trace values.
[perf] Search further back for trace values.

Change-Id: I9dbaf36270c928aabeb0d83695a860035a421d8d
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/311098
Reviewed-by: Joe Gregorio <b9cf2471ff6d33504cafe8e6f356b732b2cadced@google.com>

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot