Stopping the audio thread before destroying the AudioManager<Platform>.
The destruction of the AudioManager family happens in order of: AudioManager<Platform>, AudioManagerBase, AudioManager.
So before getting into the destruction of AudioManagerBase, we have make sure the audio thread has been stopped before AudioManager<Platform> is gone, otherwise it will end up into unexpected behavior, for example, crash because of pure virtual function.
BUG=117470
TEST=media_unittests, Address Sanitizer
Review URL: http://codereview.chromium.org/9692038
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@126635 0039d316-1c4b-4281-b951-d872f2087c98
13 files changed
