DevTools: revert to last committed live expression on escape

Bug: none
Change-Id: I6e206b63e45e8b6e4510125195aa1169223d5d1e
Reviewed-on: https://chromium-review.googlesource.com/1220550
Reviewed-by: Joel Einbinder <einbinder@chromium.org>
Commit-Queue: Erik Luo <luoe@chromium.org>
Cr-Commit-Position: refs/heads/master@{#592664}
2 files changed