Check audio_bytes_per_frame in ContentDecryptorDelegate::DeserializeAudioFrames().
    
This is to avoid division-by-zero error if the audio format isn't set properly.

TBR=dmichael@chromium.org
BUG=169105

Review URL: https://codereview.chromium.org/149473006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249571 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 249571
Add sfx.adts test data BUG=341648

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249572 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 249572