Add RasterWindowContext_mac

Add RasterWindowContext_mac

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2228883003

Committed: https://skia.googlesource.com/skia/+/a489e3f1fb94554cfba03e9966df1cc37dd97f70

[jvanverth1, 2016-08-09 16:57:04]

Description was changed from

==========
Add RasterWindowContext_mac

BUG=skia:
==========

to

==========
Add RasterWindowContext_mac

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2228883003
==========

[jvanverth1, 2016-08-09 16:57:52]

jvanverth@google.com changed reviewers:
+ bsalomon@google.com, reed@google.com

[bsalomon, 2016-08-09 17:05:48]

lgtm, but could we have a comment somewhere in the new cpp about using SDL (why
and why we'd like to not in the future.)

[jvanverth1, 2016-08-09 17:27:52]

On 2016/08/09 17:05:48, bsalomon wrote:
> lgtm, but could we have a comment somewhere in the new cpp about using SDL
(why
> and why we'd like to not in the future.)

Done. I also enabled backend switching via 'd'.

[jvanverth1, 2016-08-09 17:27:57]

The CQ bit was checked by jvanverth@google.com

[jvanverth1, 2016-08-09 17:27:58]

The patchset sent to the CQ was uploaded after l-g-t-m from bsalomon@google.com
Link to the patchset: https://codereview.chromium.org/2228883003/#ps20001
(title: "Address comment; enable backend switching")

[commit-bot: I haz the power, 2016-08-09 17:28:03]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-08-09 17:53:13]

Description was changed from

==========
Add RasterWindowContext_mac

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2228883003
==========

to

==========
Add RasterWindowContext_mac

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2228883003

Committed:
https://skia.googlesource.com/skia/+/a489e3f1fb94554cfba03e9966df1cc37dd97f70
==========

[commit-bot: I haz the power, 2016-08-09 17:53:14]

Committed patchset #2 (id:20001) as
https://skia.googlesource.com/skia/+/a489e3f1fb94554cfba03e9966df1cc37dd97f70