GitLab

We are accessing null RenderWidgetHostView. Also added a test which
exposed an issue with emulation commands not being processed when
crashed.

Bug: 818573
Change-Id: Ife852d5323b56d2d08382ef865ac9bf51c5476ff
Reviewed-on: https://chromium-review.googlesource.com/949725Reviewed-by: Pavel Feldman <pfeldman@chromium.org>
Commit-Queue: Dmitry Gozman <dgozman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#540998}