GitLab

This bool is always true, and is not used. No need to send it.
Also removes the dead needs_repainting_on_restore_ from the
RenderWidgetHostImpl.

R=ajwong@chromium.org, dcheng@chromium.org, piman@chromium.org

Bug: 419087
Change-Id: I673e5de215a9118b061478260d0dc012ae078d37
Reviewed-on: https://chromium-review.googlesource.com/1246942Reviewed-by: Antoine Labour <piman@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Albert J. Wong <ajwong@chromium.org>
Commit-Queue: danakj <danakj@chromium.org>
Cr-Commit-Position: refs/heads/master@{#594482}