ServiceWorker: Update a page set for the test of ServiceWorker
Currently a wpr file is obsolete, and perf for SW cannot work correctly because of some spec changes. This is solved by this patch.
BUG=372759
TEST=./tools/perf/run_benchmark --browser=android-chrome-shell service_worker.service_worker
This must be executed after commenting out '@benchmark.Disabled' in tools/perf/benchmarks/service_worker.py.
Review URL: https://codereview.chromium.org/
620553012
Cr-Commit-Position: refs/heads/master@{#298354}