Add decoder de-initialization and reset to the Pepper CDM API.

Adds pepper type PP_StreamType for identifying type of decoder.

BUG=141780
TEST=


Review URL: https://chromiumcodereview.appspot.com/11028087

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@161522 0039d316-1c4b-4281-b951-d872f2087c98
22 files changed