Implement deferred decoder initialization.

BUG=309159
TEST=compile

Review URL: https://codereview.chromium.org/33873002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@230582 0039d316-1c4b-4281-b951-d872f2087c98
Cleanup use of wrong statement in webrtc identity store.

Two statements are active in Commit(), one case accidentally crossed
the streams.

BUG=none

Review URL: https://codereview.chromium.org/38243002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@230583 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 230583