Web Animations: Fix pseudo element keyframe style resolution crash

Web Animations: Fix pseudo element keyframe style resolution crash

Pseudo element keyframe animations were not being resolved with the correct
StyleResolverState::element(). This bug is likely due to mismatched
parameter names in CSSAnimations::calculateUpdate().

This patch corrects the Element passed to StyleResolverState when resolving
keyframe animation styles and ensures the parameter names under
CSSAnimations::calculateUpdate() and related helper functions are consistent
with what gets passed in from StyleResolver::applyAnimatedProperties().

BUG=412979, 360457
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=182031

[alancutter (OOO until 2018), 2014-09-12 04:48:48]

alancutter@chromium.org changed reviewers:
+ dstockwell@chromium.org, esprehn@chromium.org

[dstockwell, 2014-09-15 23:51:51]

dstockwell@chromium.org changed reviewers:
+ timloh@chromium.org
- dstockwell@chromium.org

[dstockwell, 2014-09-15 23:55:43]

+tim

[esprehn, 2014-09-16 00:10:52]

lgtm

[alancutter (OOO until 2018), 2014-09-16 00:13:17]

The CQ bit was checked by alancutter@chromium.org

[commit-bot: I haz the power, 2014-09-16 00:14:36]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patchset/566803002/1

[commit-bot: I haz the power, 2014-09-16 06:20:11]

Committed patchset #1 (id:1) as 182031