Revert of Speeup hairline curves (quads and cubics)

Revert of Speeup hairline curves (quads and cubics) (patchset #7 id:120001 of https://codereview.chromium.org/1078413003/)

Reason for revert:
Crazy failings in chrome tests
http://build.chromium.org/p/client.skia/builders/Linux%20Tests/builds/1862


Original issue's description:
> Speeup hairline curves (quads and cubics)
> 
> /skia/trunk> cat ../old.txt 
> maxrss	loops	min	median	mean	max	stddev	samples   	config	bench
>    9M	1	4.28ms	4.32ms	4.36ms	4.67ms	3%	▄▁▁▃▂▂▁▁▂█	8888	path_hairline_small_AA_cubic
>    9M	1	743µs	767µs	770µs	825µs	4%	▃▃▇▃▁▁▅▁█▁	8888	path_hairline_small_AA_conic
>    9M	1	533µs	606µs	598µs	680µs	9%	▁▂▂█▆▇▇▄▂▂	8888	path_hairline_small_AA_quad
>    9M	1	451µs	452µs	456µs	495µs	3%	▁▁▁▁█▁▁▁▁▁	8888	path_hairline_small_AA_line
> 
> /skia/trunk> cat ../new.txt 
> maxrss	loops	min	median	mean	max	stddev	samples   	config	bench
>    9M	1	827µs	827µs	831µs	869µs	2%	▁▁▁▁▁▁▁█▁▁	8888	path_hairline_small_AA_cubic
>    9M	1	515µs	517µs	517µs	518µs	0%	▇█▆▅▃▃▁▁▁▅	8888	path_hairline_small_AA_conic
>    9M	1	310µs	311µs	315µs	332µs	2%	▂▁█▆▁▁▁▁▁▁	8888	path_hairline_small_AA_quad
>    9M	1	254µs	254µs	258µs	276µs	3%	▁▁▁▁▁▁▁█▇▂	8888	path_hairline_small_AA_line
> 
> Edited revert of https://codereview.chromium.org/1085013003
> 
> TBR=
> 
> Expectations:
> - no effect on chrome, as it is guarded
> - lots of tiny rebaselines for skia

TBR=
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Committed: https://skia.googlesource.com/skia/+/639a82855b94b93c4fa45560e67df8ec4a8bbb3a

[reed1, 2015-04-15 21:37:48]

Created Revert of Speeup hairline curves (quads and cubics)

[commit-bot: I haz the power, 2015-04-15 21:38:01]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1092483003/1

[commit-bot: I haz the power, 2015-04-15 21:38:12]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/639a82855b94b93c4fa45560e67df8ec4a8bbb3a