This is a reland of 14824520

Original change's description:
> [inspector] added Runtime.terminateExecution
>
> Runtime.terminateExecution terminates current or next JavaScript
> call. Termination flag is automatically reset as soon as v8 call
> or microtasks are completed.
>
> R=pfeldman@chromium.org
>
> Bug: chromium:820640
> Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
> Change-Id: Ie21c123be3a61fe25cf6e04c38a8b6c664622ed7
> Reviewed-on: https://chromium-review.googlesource.com/957386
> Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
> Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#51912}

Bug: chromium:820640
Cq-Include-Trybots: luci.chromium.try:linux_chromium_rel_ng;master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I6dd30f65c06c2b7eefd1e7beb9a3cf50ea5bf8cd
Reviewed-on: https://chromium-review.googlesource.com/967323
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52004}