Update stroke path to use rect returned from isRect (to fix trailing moveTo bug)

Update stroke path to use rect returned from isRect (to fix trailing moveTo bug)

This basically recreates what was done in:

https://codereview.chromium.org/16950021/ (add rect-output parameter to isRect, allowing us to return the correct bounds even if a rectagular path has a trailing moveTo) with the addition of GM representation

BUG=247770
Committed: https://skia.googlesource.com/skia/+/4f662e62cd44e302ef689fabdb2c0ae8d9471b02

[robertphillips, 2014-12-29 21:37:57]

robertphillips@google.com changed reviewers:
+ bsalomon@google.com

[bsalomon, 2014-12-29 21:50:10]

On 2014/12/29 21:44:28, robertphillips wrote:

lgtm, but do we need both shortcut versions?

[robertphillips, 2014-12-29 21:52:20]

On 2014/12/29 21:50:10, bsalomon wrote:
> On 2014/12/29 21:44:28, robertphillips wrote:
> 
> lgtm, but do we need both shortcut versions?

I'm in favor of removing all the call sites for the two old versions but was
going to discuss it with Mike after the break.

[robertphillips, 2014-12-29 21:57:12]

The CQ bit was checked by robertphillips@google.com

[commit-bot: I haz the power, 2014-12-29 21:57:35]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/834503002/20001

[commit-bot: I haz the power, 2014-12-29 22:06:55]

Committed patchset #2 (id:20001) as
https://skia.googlesource.com/skia/+/4f662e62cd44e302ef689fabdb2c0ae8d9471b02