MacViews: Implement non-client frame view

MacViews: Implement non-client frame view

Create Mac specific BrowserNonClientFrameViewMac, stop sharing
OpaqueBrowserFrameView.
Draw the frame using Mac colors, assets, and spacing.

Screenshot: https://code.google.com/p/chromium/issues/detail?id=425229#c40

BUG=425229
Committed: https://crrev.com/b7046495e70e7878d9ff20788f0f54a61775cd5d
Cr-Commit-Position: refs/heads/master@{#321290}

[Andre, 2015-03-18 20:43:21]

andresantoso@chromium.org changed reviewers:
+ sky@chromium.org

[Andre, 2015-03-18 20:43:22]

sky@ PTAL.

[sky, 2015-03-18 23:02:04]

LGTM

[Andre, 2015-03-18 23:14:49]

The CQ bit was checked by andresantoso@chromium.org

[commit-bot: I haz the power, 2015-03-18 23:18:07]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1019023002/20001

[commit-bot: I haz the power, 2015-03-19 03:19:16]

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

[commit-bot: I haz the power, 2015-03-19 03:19:17]

Try jobs failed on following builders:
  linux_chromium_asan_rel on tryserver.chromium.linux (JOB_TIMED_OUT, no build
URL)
Timed out jobs are not retried to avoid causing additional load on the builders
with large pending queues.

[Andre, 2015-03-19 03:38:39]

The CQ bit was checked by andresantoso@chromium.org

[commit-bot: I haz the power, 2015-03-19 03:38:51]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1019023002/20001

[commit-bot: I haz the power, 2015-03-19 04:16:52]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-03-19 04:17:32]

Patchset 2 (id:??) landed as
https://crrev.com/b7046495e70e7878d9ff20788f0f54a61775cd5d
Cr-Commit-Position: refs/heads/master@{#321290}