Mojo: Introduces mojo::EventType and mojo::EventFlags

Mojo: Introduces mojo::EventType and mojo::EventFlags

This change introduces EventType and EventFlags enum types
which mirror ui::EventType and ui::EventFlags. With these,
simple mouse/touch based Mojo apps no longer have to depend
on the ui module.

Note that this doesn't introduce any keycodes. It will need
some non-trivial work which deserves its own CL.

BUG=330467
R=beng@chromium.org, darin@chromium.org, viettrungluu@chromium.org
TEST=none

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=285080

[darin (slow to review), 2014-07-23 04:04:33]

Ben should take a look. This seems like a good change to me.

[Ben Goodger (Google), 2014-07-23 16:23:44]

yeah lgtm.

[Hajime Morrita, 2014-07-23 17:34:51]

The CQ bit was checked by morrita@chromium.org

[commit-bot: I haz the power, 2014-07-23 17:35:20]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/morrita@chromium.org/413633003/20001

[commit-bot: I haz the power, 2014-07-23 21:05:48]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  win_chromium_x64_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/win_chromium_x64_rel/...)

[commit-bot: I haz the power, 2014-07-24 00:06:31]

Change committed as 285080