Revert of Finalize migration of blink_perf.animation to smoothness.tough_animation_cases

Revert of Finalize migration of blink_perf.animation to smoothness.tough_animation_cases (patchset #1 id:1 of https://codereview.chromium.org/1175453002/)

Reason for revert:
Speculative revert, blink_perf.animation/oilpan_gc_times.blink_perf_animation failing

BUG=498264
Original issue's description:
> Finalize migration of blink_perf.animation to smoothness.tough_animation_cases
> 
> This patch removes blink_perf.animation as the last remaining perf tests
> have been migrated to src/tools/perf/page_sets/tough_animation_cases as
> part of the smoothness.tough_animation_cases benchmark, see:
> https://codereview.chromium.org/1156993002 for migration patch.
> 
> 
> BUG=490225
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=196749

TBR=timloh@chromium.org,alancutter@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=490225
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=196776

[shatch, 2015-06-09 15:46:45]

Created Revert of Finalize migration of blink_perf.animation to
smoothness.tough_animation_cases

[commit-bot: I haz the power, 2015-06-09 15:47:41]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1163373006/1

[commit-bot: I haz the power, 2015-06-09 15:48:45]

Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=196776

[alancutter (OOO until 2018), 2015-06-09 23:36:26]

On 2015/06/09 at 15:48:45, commit-bot wrote:
> Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=196776

Thanks for the revert.