GitLab

Changes for CDM_6:
- ReleaseSession() becomes CloseSession()
- add RemoveSession()
- add GetUsableKeyIds()
- simulate UsableKeysChanged event for older CDMs

BUG=358271,351139
TEST=encrypted-media layout tests and browser_tests for encrypted media pass

Review URL: https://codereview.chromium.org/446693004

Cr-Commit-Position: refs/heads/master@{#288295}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@288295 0039d316-1c4b-4281-b951-d872f2087c98