Revert of CSS Transforms: Implement transform-style

Revert of CSS Transforms: Implement transform-style (https://codereview.chromium.org/211123002/)

Reason for revert:
Breaks perf test: src/tools/perf/tough_animation_cases/transform_transition_js_block.html

BUG=356859
Original issue's description:
> CSS Transforms: Implement transform-style
> 
> Implements transform-style as defined in CSS Transforms[1]. Behavior is
> identical to -webkit-transform-style.
> 
> Note, this property is guarded by the CSSTransformsUnprefixed runtime feature
> (enabled only for testing).
> 
> [1] http://www.w3.org/TR/css3-transforms/
> 
> BUG=154772
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=170013
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=170166

TBR=eseidel@chromium.org,dstockwell@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=154772
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=170227

[alancutter (OOO until 2018), 2014-03-28 00:09:46]

Created Revert of CSS Transforms: Implement transform-style

[commit-bot: I haz the power, 2014-03-28 00:09:53]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/alancutter@chromium.org/215843003/1

[commit-bot: I haz the power, 2014-03-28 00:10:36]

Change committed as 170227