DevTools: Switch to using tracing-based JS CPU sampling.
DevTools: Switch to using tracing-based JS CPU sampling.

BUG=406277

Change-Id: Ib7ee64bc3268148d85cb4610eb246ae64e7a51ab
Reviewed-on: https://chromium-review.googlesource.com/1123257
Reviewed-by: Dmitry Gozman <0ca14b32cbb359a30ac562af27dd84cc2813eacb@chromium.org>
Commit-Queue: Alexei Filippov <52e51c43e283548b762e3c9dd9a4600768db9fb4@chromium.org>
Cr-Original-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#572916}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 7633f97f8368e49b9d6404a4f96856b5c277c150
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