This is a reland of deb875f7

Original change's description:
> [inspector] added timeout argument for Runtime.evaluate
> 
> R=yangguo@chromium.org,dgozman@chromium.org
> 
> Bug: none
> Cq-Include-Trybots: luci.chromium.try:linux_chromium_rel_ng;master.tryserver.blink:linux_trusty_blink_rel
> Change-Id: I31667b3d5f39db9d899d58acd5205a9c34e570db
> Reviewed-on: https://chromium-review.googlesource.com/1005985
> Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
> Reviewed-by: Yang Guo <yangguo@chromium.org>
> Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#52594}

Bug: none
Change-Id: Ib8aff5d9f83e41fc6c2019712708fda074bd1ad9
Cq-Include-Trybots: luci.chromium.try:linux_chromium_rel_ng;master.tryserver.blink:linux_trusty_blink_rel
Reviewed-on: https://chromium-review.googlesource.com/1012724Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52603}