Reland of more zero-length changes for svg compatibility

Reland of more zero-length changes for svg compatibility (patchset #1 id:1 of https://codereview.chromium.org/1334543002/ )

Reason for revert:
DEPS should be fixed now

Original issue's description:
> Revert of more zero-length changes for svg compatibility (patchset #6 id:100001 of https://codereview.chromium.org/1330623003/ )
> 
> Reason for revert:
> breaks DEPS
> 
> Original issue's description:
> > more zero-length changes for svg compatibility
> > 
> > If a path contains a moveTo followed by a line or curve,
> > even if the line or curve has no length, SVG expects
> > the end caps to draw if the cap style is round or square.
> > 
> > Fredrik Söderquist attached a patch to the chrome bug
> > (slightly modified here) that fixes layout test failures
> > resulting from deleting special-case code in SVG
> > dealing with zero-length path segments.
> > 
> > R=reed@google.com,fs@opera.com
> > BUG=22974
> > 
> > Committed: https://skia.googlesource.com/skia/+/62fb1ba1786863e545c89839b5706ad5151cec15
> 
> TBR=fs@opera.com,reed@google.com
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=22974
> 
> Committed: https://skia.googlesource.com/skia/+/5ca4fa3846067a47e88d35ace895df3ebe3ec2a5

TBR=fs@opera.com,reed@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=22974
Committed: https://skia.googlesource.com/skia/+/6651a3238dd6affa4276ada42ab613abf1d42d1d

[caryclark, 2015-09-09 20:20:34]

Created Reland of more zero-length changes for svg compatibility

[commit-bot: I haz the power, 2015-09-09 20:20:41]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1314833004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1314833004/1

[commit-bot: I haz the power, 2015-09-09 20:20:52]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/6651a3238dd6affa4276ada42ab613abf1d42d1d