Better error handling in audio wave out. Fix calling NULL callback, slightly reorder the code to avoid potential problems.
Better error handling in audio wave out.
Fix calling NULL callback, slightly reorder the code
to avoid potential problems.

BUG=108685

Review URL: http://codereview.chromium.org/9124024

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@116976 0039d316-1c4b-4281-b951-d872f2087c98

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