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The 'options' argument has been replaced with a new 'run_options',
where callers are expected to pass a fully formed options object with
all settings required to run benchmark stories.

This also requires clients to provide an output_dir suitably wired
to a temp_dir for tests.

Bug: 985712
Change-Id: If26078caa61f7b0a006906420899109d1f4e9a8b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1720839
Commit-Queue: Juan Antonio Navarro Pérez <perezju@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Ravi Mistry <rmistry@chromium.org>
Reviewed-by: Caleb Rouleau <crouleau@chromium.org>
Cr-Commit-Position: refs/heads/master@{#683517}