Use NativeComboboxViews instead of NativeComboboxWin on Windows.

Use NativeComboboxViews instead of NativeComboboxWin on Windows.

Always use NativeComboBoxViews on non-Aura Win.
Enable NativeComboBoxViewsTest on non-Aura Win.
Both of these are already used on CrOS and Win Aura.
See non-Aura Win differences at http://crbug.com/175843#c1

TODO(followup): Tweak behavior/appearance of Views impl.
TODO(followup): Nix [Win|Wrapper], flatten Views->ComboBox.

BUG=175843
TEST=Windows combo-boxes look and behave different, but sane.
R=sky@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=182358

[msw, 2013-02-12 23:35:27]

Hey Scott, please take a look; thanks!
Andrew thinks it's okay as-is (at least for Dev).
I'll tweak Views (or revert to Win) as needed in followups.

[sky, 2013-02-13 00:36:16]

LGTM

[commit-bot: I haz the power, 2013-02-13 00:41:18]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/msw@chromium.org/12217151/2001

[commit-bot: I haz the power, 2013-02-13 15:09:41]

Retried try job too often on win7_aura for step(s) browser_tests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=win7_aura&...

[commit-bot: I haz the power, 2013-02-13 18:14:19]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/msw@chromium.org/12217151/2001

[commit-bot: I haz the power, 2013-02-13 19:34:38]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/msw@chromium.org/12217151/2001

[commit-bot: I haz the power, 2013-02-14 00:54:44]

Change committed as 182358