Reland of path ops: fix conic weight and partial coincidence

Reland of path ops: fix conic weight and partial coincidence (patchset #1 id:1 of https://codereview.chromium.org/1408923003/ )

Reason for revert:
suppressions have landed in chrome

Original issue's description:
> Revert of path ops: fix conic weight and partial coincidence (patchset #5 id:80001 of https://codereview.chromium.org/1413763002/ )
> 
> Reason for revert:
> path ops change breaks svg clipping layout tests -- conic is now more accurate, changing edge of circle in clip
> 
> These need to be rebaselined
> 
> svg/clip-path/clip-path-child-clipped.svg
> svg/clip-path/clip-path-nonzero.svg
> svg/clip-path/clip-path-evenodd-nonzero.svg
> svg/clip-path/clip-path-nonzero-evenodd.svg
> 
> Original issue's description:
> > The remaining 1m skp bugs are asserts that can be harmlessly
> > suppressed and bugs around conics.
> > 
> > The conic calculation for a subdivided w was just wrong.
> > 
> > Also added debugging to template intersection to initialize
> > reused structures and dump additional data.
> > 
> > TBR=reed@google.com
> > 
> > Committed: https://skia.googlesource.com/skia/+/ef33b1e739b23a1201100ff17a572da85b03d9af
> 
> TBR=
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> 
> Committed: https://skia.googlesource.com/skia/+/f428df1be3e96d3f8970d0f7f415b862f7da5404

TBR=
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Committed: https://skia.googlesource.com/skia/+/ed0935a28a29af7d3b16ac8d9365f291a335c6bd

[caryclark, 2015-10-22 14:23:37]

Created Reland of path ops: fix conic weight and partial coincidence

[commit-bot: I haz the power, 2015-10-22 14:23:45]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1407003016/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1407003016/1

[commit-bot: I haz the power, 2015-10-22 14:23:56]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/ed0935a28a29af7d3b16ac8d9365f291a335c6bd