[Sampling profiler] Change filename field to debug basename

Updates the field and accessor name to reflect its actual state, and to
be consistent across platforms.

Bug: 931418
Change-Id: I758a7bb8c8183174c42142563203e8e5acd20c37
Reviewed-on: https://chromium-review.googlesource.com/c/1478250
Commit-Queue: Mike Wittman <wittman@chromium.org>
Reviewed-by: Andrey Kosyakov <caseq@chromium.org>
Reviewed-by: oysteine <oysteine@chromium.org>
Reviewed-by: Alexei Filippov <alph@chromium.org>
Reviewed-by: Charlie Andrews <charliea@chromium.org>
Cr-Commit-Position: refs/heads/master@{#636551}
8 files changed