Check if a command can be executed before executing it via a shortcut.

Check if a command can be executed before executing it via a shortcut.

Commands are updated when focus is updated. This makes sense, when executing commands by pressing an ui element. However, when executing a command via a shortcut, we may execute it while it shouldn't be allowed to be executed. This patch fixes it by updating the command's state (disabled/enabled) just before executing it via a shortcut.

TEST=Enter Files.app, select a file, then deselect a file, hit Delete button. A delete command should not be invoked.
BUG=174554
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=192514

[mtomasz, 2013-04-04 13:23:29]

@arv: PTAL. Thanks.

[arv (Not doing code reviews), 2013-04-04 18:48:20]

LGTM

Makes sense

[commit-bot: I haz the power, 2013-04-05 01:21:12]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/mtomasz@chromium.org/13532006/1

[commit-bot: I haz the power, 2013-04-05 05:59:13]

Change committed as 192514