This reverts commit 14824520.

Reason for revert: Breaks chromium tsan in roll:
https://chromium-review.googlesource.com/c/chromium/src/+/967682

Original change's description:
> Reland "[inspector] added Runtime.terminateExecution"
> 
> This is a reland of 98dec8f2
> 
> 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
> Change-Id: I8f270c2fdbe732f0c40bfb149d26a6e73d988253
> Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
> Reviewed-on: https://chromium-review.googlesource.com/966681
> Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
> Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#52002}

TBR=dgozman@chromium.org,pfeldman@chromium.org,kozyatinskiy@chromium.org

Change-Id: I2f3d24b238f479082bfed349363240887b5ba751
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:820640
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Reviewed-on: https://chromium-review.googlesource.com/967781Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52003}