Add a thread_times.key_noop_cases benchmark

Add a thread_times.key_noop_cases benchmark

There are a number of common interaction scenarios that should have few
expensive side effects. This includes no-op touch handlers, no-op rAF,
scrolling unnscrollable pages, tapping empty space, etc... Create such a
benchmark with the mentioned scenarios, ensuring they remain cheap.

BUG=490465
CQ_EXTRA_TRYBOTS=tryserver.chromium.perf:linux_perf_bisect;tryserver.chromium.perf:mac_perf_bisect;tryserver.chromium.perf:win_perf_bisect;tryserver.chromium.perf:android_nexus5_perf_bisect

Review URL: https://codereview.chromium.org/1274473002

Cr-Commit-Position: refs/heads/master@{#342412}