Fix NSMenuItemAdditionsTest.TestMOnDifferentLayouts on 10.11

Fix NSMenuItemAdditionsTest.TestMOnDifferentLayouts on 10.11

The keyboard layout ABC - AZERTY was added in 10.11, which maps 'm' to the
same keycode as the Belgian, Italian, and French layouts. Add this case.

BUG=none
TEST=NSMenuItemAdditionsTest.TestMOnDifferentLayouts

Committed: https://crrev.com/f9f39df91828ff9acdfc2b6921b2397011c3d19e
Cr-Commit-Position: refs/heads/master@{#342375}

[Bons, 2015-08-07 17:17:04]

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

[Robert Sesek, 2015-08-07 17:18:28]

lgtm

[Bons, 2015-08-07 17:19:27]

The CQ bit was checked by andybons@chromium.org

[commit-bot: I haz the power, 2015-08-07 17:19:48]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1282543002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1282543002/1

[commit-bot: I haz the power, 2015-08-07 17:39:57]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-08-07 17:40:40]

Patchset 1 (id:??) landed as
https://crrev.com/f9f39df91828ff9acdfc2b6921b2397011c3d19e
Cr-Commit-Position: refs/heads/master@{#342375}