nibless mac, visual bench working on mac

Allows windowed apps to be built on the Mac just by writing a SkOSWindow subclass without needing nib/plist files.

Makes visualbench work on the Mac.

Committed: https://skia.googlesource.com/skia/+/241b56db1d5c9d058dc316ad33b397be50428c4c

[bsalomon, 2015-06-18 17:35:32]

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

[bsalomon, 2015-06-18 17:50:17]

The CQ bit was checked by bsalomon@google.com

[commit-bot: I haz the power, 2015-06-18 17:50:32]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1184143011/60001

[commit-bot: I haz the power, 2015-06-18 17:50:33]

Note for Reviewers:
The CQ is waiting for an approval.
If you believe that the CL is not ready yet, or if you would like to L-G-T-M
with comments then please uncheck the CQ checkbox.

Waiting for LGTM from valid reviewer(s) till 2015-06-18 23:50 UTC

[commit-bot: I haz the power, 2015-06-18 17:56:07]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-06-18 17:56:08]

Try jobs failed on following builders:
  Build-Win-MSVC-x86-Debug-Trybot on client.skia.compile (JOB_FAILED,
http://build.chromium.org/p/client.skia.compile/builders/Build-Win-MSVC-x86-D...)
  Build-Win-MSVC-x86_64-Debug-Trybot on client.skia.compile (JOB_FAILED,
http://build.chromium.org/p/client.skia.compile/builders/Build-Win-MSVC-x86_6...)

[joshualitt, 2015-06-18 18:04:57]

On 2015/06/18 17:56:08, commit-bot: I haz the power wrote:
> Try jobs failed on following builders:
>   Build-Win-MSVC-x86-Debug-Trybot on client.skia.compile (JOB_FAILED,
>
http://build.chromium.org/p/client.skia.compile/builders/Build-Win-MSVC-x86-D...)
>   Build-Win-MSVC-x86_64-Debug-Trybot on client.skia.compile (JOB_FAILED,
>
http://build.chromium.org/p/client.skia.compile/builders/Build-Win-MSVC-x86_6...)

lgtm

[bsalomon, 2015-06-18 18:44:00]

The CQ bit was checked by bsalomon@google.com

[bsalomon, 2015-06-18 18:44:00]

The patchset sent to the CQ was uploaded after l-g-t-m from
joshualitt@google.com
Link to the patchset: https://codereview.chromium.org/1184143011/#ps80001
(title: "fix HelloWorld compile on windows")

[commit-bot: I haz the power, 2015-06-18 18:44:22]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1184143011/80001

[commit-bot: I haz the power, 2015-06-18 18:49:46]

Committed patchset #5 (id:80001) as
https://skia.googlesource.com/skia/+/241b56db1d5c9d058dc316ad33b397be50428c4c