Video Wake Lock: cancel wake lock when context is paused/destroyed.

Bug: 980024
Change-Id: I49fdaac8ea558a6068a3de6ba7d74e922ee9de81
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1691255
Reviewed-by: Jeremy Roman <jbroman@chromium.org>
Commit-Queue: Mounir Lamouri <mlamouri@chromium.org>
Cr-Commit-Position: refs/heads/master@{#675699}
6 files changed