Revert of Add unit tests for CdmAdapter

Revert of Add unit tests for CdmAdapter (patchset #6 id:100001 of https://codereview.chromium.org/1428753010/ )

Reason for revert:
valgrind reports leaks with no-debug-symbol callstack

BUG=556346
TBR=jrummell@chromium.org

Original issue's description:
> Add unit tests for CdmAdapter
>
> BUG=510088
> TEST=new unittests pass
>
> Committed: https://crrev.com/30996193fe3e69fe9ccd52471900bf5685c54956
> Cr-Commit-Position: refs/heads/master@{#359582}

TBR=xhwang@chromium.org,jrummell@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=510088
Committed: https://crrev.com/0d6792ab1bb79274f0945556c46e2fc4f1611e54
Cr-Commit-Position: refs/heads/master@{#359798}

[zhaoqin1, 2015-11-16 03:45:05]

Created Revert of Add unit tests for CdmAdapter

[commit-bot: I haz the power, 2015-11-16 03:45:10]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1447943002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1447943002/1

[commit-bot: I haz the power, 2015-11-16 03:45:46]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-11-16 03:46:40]

Patchset 1 (id:??) landed as
https://crrev.com/0d6792ab1bb79274f0945556c46e2fc4f1611e54
Cr-Commit-Position: refs/heads/master@{#359798}