Fix MacViews views_unittest simulate FullScreen test for 10.7+ SDKs

Fix MacViews views_unittest simulate FullScreen test for 10.7+ SDKs

bridged_native_widget_unittest.mm currently fails to compile on 10.7+
SDKs because there is no such thing as
NSWindowDidFailToEnterFullScreenNotification (whoops).

The failures don't go through NSNotificationCenter, but to the
NSWindowDelegate protocol directly. So, add a dummy protocol for 10.6
and, in the simulate fullscreen failure test, send
windowDidFailTo{Enter,Exit}FullScreen to the window delegate directly.

Call via `id` so the test compiles on 10.6 SDKs, but return early so the
tests pass when actually running on 10.6.

BUG=378134
TEST=By tracing the simulation test, and manually to generate an actual
failure.

Committed: https://crrev.com/4863f1de058a942ef677ccc05805ea75b9ee4cb9
Cr-Commit-Position: refs/heads/master@{#300366}

[tapted, 2014-10-20 05:47:08]

tapted@chromium.org changed reviewers:
+ rsesek@chromium.org

[tapted, 2014-10-20 05:47:09]

Hi Robert, PTAL. I missed that the simulated test wasn't calling these functions
since they just DCHECK :/ .. but this should make it happy everywhere.

[Robert Sesek, 2014-10-20 15:07:25]

LGTM

[tapted, 2014-10-20 21:23:21]

The CQ bit was checked by tapted@chromium.org

[commit-bot: I haz the power, 2014-10-20 21:25:27]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/665823002/20001

[commit-bot: I haz the power, 2014-10-20 22:45:13]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2014-10-20 22:46:30]

Patchset 2 (id:??) landed as
https://crrev.com/4863f1de058a942ef677ccc05805ea75b9ee4cb9
Cr-Commit-Position: refs/heads/master@{#300366}