GitLab

Reland: Reland: Network Service: Use histograms instead of chartjsons for network service performance tests

The initial upload of this CL is the same as:
https://chromium-review.googlesource.com/c/chromium/src/+/1456694

New changes in this CL from the above original CL:
The linux-perf-fyi bot failed at:
https://ci.chromium.org/p/chrome/builders/luci.chrome.ci/linux-perf-fyi/1769
And it is because test_results.json is null. This file is generated when
"--output-format=json-test-results" is set. In the above original CL, it uses:
finder_options.output_formats = ['chartjson']
and this removes other entries in the output_formats. This CL keeps the
original finder_options.output_formats while replacing 'histograms' with
'chartjson' when feed it into the story_runner.

This CL modifies the network service performance tests to generate
histograms instead of chartjsons so that the Pinpoint can automatic
bisect CLs.

TBR=crouleau@chromium.org, jam@chromium.org, simonhatch@chromium.org, benjhayden@chromium.org

Bug: 927155
Change-Id: I1e49a9d3e5e6ff8b085fda6bb2005b79993a4cf1
Reviewed-on: https://chromium-review.googlesource.com/c/1457730Reviewed-by: Jun Cai <juncai@chromium.org>
Reviewed-by: Caleb Rouleau <crouleau@chromium.org>
Commit-Queue: Jun Cai <juncai@chromium.org>
Cr-Commit-Position: refs/heads/master@{#630110}