Fix the unnecessary sleep when no back to back OnData call.

Fix the unnecessary sleep when no back to back OnData call.

The sleep is required by Pepper Flash input to avoid back to back OnData() call, which will override the previous buffer if it happens.

This CL is a follow up to https://codereview.chromium.org/465313002/

BUG=403675
TEST=bots.

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=290243

[no longer working on chromium, 2014-08-18 09:38:20]

Henrik, could you please review this small CL.

[henrika (OOO until Aug 14), 2014-08-18 10:06:43]

LGTM.

Could you also add a short description in this CL explaining why Sleep is only
required for one special case and when that case is active? Thanks.

[no longer working on chromium, 2014-08-18 10:08:43]

On 2014/08/18 10:06:43, henrika wrote:
> LGTM.
> 
> Could you also add a short description in this CL explaining why Sleep is only
> required for one special case and when that case is active? Thanks.

Thanks, done with adding more info to the description.

[no longer working on chromium, 2014-08-18 10:08:46]

The CQ bit was checked by xians@chromium.org

[commit-bot: I haz the power, 2014-08-18 10:08:58]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/xians@chromium.org/486603002/1

[commit-bot: I haz the power, 2014-08-18 12:43:04]

Committed patchset #1 (1) as 290243