Don't make FrameTrack too big when expanding them (#3023)
Don't make FrameTrack too big when expanding them (#3023)

A regression from a previous refactor
(https://github.com/google/orbit/pull/2594).

We are reverting 2 lines changed from that commit.

Test: Start/Stop a capture. Load it.
google/orbit,google/orbit,google/orbit,google/orbit