fUsesLocalCoords is updated in the parent when a child proc is registered.

This code should've been part of the CL that added registerChildProcessor(); without updating fUsesLocalCoords in the parent when a child proc is registered, batching will not work properly.

BUG=skia:4182
Committed: https://skia.googlesource.com/skia/+/a71170cce8831b4d1e06bd673560f8b6fea9fbfe

[wangyix, 2015-08-20 20:41:43]

wangyix@google.com changed reviewers:
+ bsalomon@google.com, joshualitt@google.com, tomhudson@google.com

[wangyix, 2015-08-20 20:41:43]

I forgot to add this check inside registerChildProcessor().  Without this
change, there will be problems with batching.

[joshualitt, 2015-08-21 13:29:52]

On 2015/08/20 20:41:43, wangyix wrote:
> I forgot to add this check inside registerChildProcessor().  Without this
> change, there will be problems with batching.

lgtm, please update the description

[tomhudson, 2015-08-21 13:45:55]

On 2015/08/21 13:29:52, joshualitt wrote:

> lgtm, please update the description

Ditto.

[wangyix, 2015-08-21 13:50:01]

The CQ bit was checked by wangyix@google.com

[commit-bot: I haz the power, 2015-08-21 13:50:10]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1308513004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1308513004/1

[commit-bot: I haz the power, 2015-08-21 13:56:52]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/a71170cce8831b4d1e06bd673560f8b6fea9fbfe