GitLab

When we pause the media session we
should update the position to the
current position so we know were
the media was paused.

BUG=1049530

Change-Id: If651edc4a4be1bdefeaa2638289f7b0399e1094e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2047606Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Tommy Steimel <steimel@chromium.org>
Commit-Queue: Becca Hughes <beccahughes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#740438}