Check for NaN when creating a DelayNode for WebAudio

Check for NaN when creating a DelayNode for WebAudio

In createDelay(), throw an exception if the specified delay is NaN.
Check a few other places for NaN where we are creating a buffer based
on that value.

Update a layout test to check that createDelay(NaN) throws an
exception.

BUG=334083
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=165186

[Raymond Toy (Google), 2014-01-15 23:44:35]

PTAL.

[Ken Russell (switch to Gerrit), 2014-01-16 02:51:13]

lgtm

[Raymond Toy (Google), 2014-01-16 03:04:59]

On 2014/01/16 02:51:13, Ken Russell wrote:
> lgtm

Thanks!

[commit-bot: I haz the power, 2014-01-16 03:05:17]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/rtoy@google.com/138943003/30001

[commit-bot: I haz the power, 2014-01-16 03:11:27]

Change committed as 165186