Rebase WebAudio codec-tests.

Update the vorbis test results which have changed length by one
sample. Also verified that Linux, Mac, and Win can use the same set of
results, so the platform-specific versions have been removed.
Similarly, the aac test has the same expected result for Linux,
Mac, and Win so the platform specific result has been removed.

Also rebased the wav/24bit-22khz-resample.html test which was failing on Win.

Ran the layout tests manually for each platform to verify these new
results are correct.

BUG=
R=dalecurtis@chromium.org

Review URL: https://codereview.chromium.org/224513002

git-svn-id: svn://svn.chromium.org/blink/trunk@170979 bbb929c8-8fbe-4397-9dbb-9b2b20218538