Revert 227436 "Plumb PPAPI PlatformVerification into CDM.h"

> Plumb PPAPI PlatformVerification into CDM.h
>
> BUG=270296
> TEST=encrypted media browsertests.
>
> Review URL: https://codereview.chromium.org/23546014

BUG=306241,307662
R=dalecurtis@chromium.org

Review URL: https://codereview.chromium.org/27108003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@228752 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@228753 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 228752
SVN changes up to revision 228753