Ensure that ArrayBuffers actively being used by the Web Audio API cannot be neutered

Ensure that ArrayBuffers actively being used by the Web Audio API cannot be neutered

In the unusual case when such ArrayBuffers are used with web workers, they will be copied instead of transferred.
For performance reasons, it's important to *not* involve any copying of these buffers during normal use of the Web Audio API.

BUG=254728
TEST=webaudio/audiobuffer-neuter.html
TBR=dslomov@chromium.org, kbr@chromium.org

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=153973

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=154439

[Dmitry Lomov (no reviews), 2013-07-10 20:50:46]

lgtm with caveats I explained in the bug (need better fix for M30)

[commit-bot: I haz the power, 2013-07-10 21:17:15]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/crogers@google.com/19019002/1

[Ken Russell (switch to Gerrit), 2013-07-10 21:22:58]

lgtm with the same caveats.

[commit-bot: I haz the power, 2013-07-10 21:53:54]

Retried try job too often on blink_presubmit for step(s) presubmit
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=blink_pres...

[Ken Russell (switch to Gerrit), 2013-07-10 22:07:38]

Looks like you need either another review or to use TBR.

[commit-bot: I haz the power, 2013-07-10 22:24:32]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/crogers@google.com/19019002/1

[commit-bot: I haz the power, 2013-07-11 03:49:08]

Change committed as 153973

[Chris Rogers, 2013-07-17 22:32:06]

Committed patchset #2 manually as r154439 (presubmit successful).

[gavinp, 2013-07-18 16:32:40]

Reverted in r154493, it was causing flakes.

http://test-results.appspot.com/dashboards/flakiness_dashboard.html#tests=web...

and

http://test-results.appspot.com/dashboards/flakiness_dashboard.html#tests=web...