GitLab

As titled, switches everything over to using the AudioBus
class instead of const std::vector<float*>.  Allows removal
of lots of crufty allocations and memsets.

BUG=114700
TEST=unit tests, layout tests, try bots.  Nothing should change.


Review URL: https://chromiumcodereview.appspot.com/10823175

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@150906 0039d316-1c4b-4281-b951-d872f2087c98