setValueCurve can start at the end of other automations

setValueCurve can start at the end of other automations

It is valid to do this:

linearRampToValueAtTime(0, 1);
setValueCurveAtTime(curve, 1, 1);

Previously, this caused an error because the code thought the two
methods overlapped.

BUG=528423
TEST=audioparam-setValueCurve-exceptions.html updated with more tests

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=201832

[Raymond Toy, 2015-09-04 21:23:30]

rtoy@chromium.org changed reviewers:
+ hochchan@chromium.org

[Raymond Toy, 2015-09-04 21:23:30]

PTAL.

[hongchan, 2015-09-04 22:45:15]

hongchan@chromium.org changed reviewers:
+ hongchan@chromium.org

[hongchan, 2015-09-04 22:45:16]

lgtm

[Raymond Toy, 2015-09-04 22:48:57]

The CQ bit was checked by rtoy@chromium.org

[commit-bot: I haz the power, 2015-09-04 22:49:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1328963003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1328963003/1

[commit-bot: I haz the power, 2015-09-04 23:27:58]

Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=201832