GitLab

Move |cdm_| to the bottom of the declaration list so that it is
destructed first when CdmAdapter is destructed. This would help prevent
|cdm_| from accessing other deleted member during destruction.

Also clean up the declaration of other members to map initialization
order.

BUG=510088

Change-Id: I7c8535c503226089db1d7fd3ce6afcd22bc38dce
Reviewed-on: https://chromium-review.googlesource.com/742327Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Dan Sanders <sandersd@chromium.org>
Commit-Queue: Xiaohan Wang <xhwang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#512620}