Fix keyTimes list length of from/to/by animations.

Fix keyTimes list length of from/to/by animations.

For from/to/by animations, the length of keyTimes and keyPoints
attribute if are specified must be equal and must have at least
2 values.

R=fs@opera.com,dschulze@chromium.org
BUG=377050
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=180390

[reni, 2014-08-14 11:33:17]

Added a check for from/to/by animations that if both keypoints and keytimes
attributes are defined then the length of their value lists has to be equal and
at least two long. (Similar checks were already made for value and path
animations but not for from/to/by types.)

[fs, 2014-08-15 18:34:50]

LGTM (some parts of this method are a bit thorny...)

[reni, 2014-08-15 20:25:28]

The CQ bit was checked by rhodovan.u-szeged@partner.samsung.com

[commit-bot: I haz the power, 2014-08-15 20:25:58]

CQ is trying da patch. Follow status at

https://chromium-status.appspot.com/cq/rhodovan.u-szeged@partner.samsung.com/...

[reni, 2014-08-15 20:58:35]

On 2014/08/15 18:34:50, fs (ooo) wrote:
> LGTM (some parts of this method are a bit thorny...)

Thanks!

[commit-bot: I haz the power, 2014-08-15 21:34:27]

Committed patchset #2 (20001) as 180390