Handle Caps Lock short cut (Shift+Search) in ash [part 1 of 2].

Currently it's handled in chrome/browser/chromeos/system_key_event_listener.cc by checking the X event loop directly, but for Aura, it'd be better to remove the X dependency by moving the code to ash/accelerators/ since any class except aura::RootWindowHost should not handle an X event directly.

Part 2 of 2: https://chromiumcodereview.appspot.com/9225004/

BUG=110129
TEST=ran aura_shell_unittests


Review URL: http://codereview.chromium.org/9242003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@118035 0039d316-1c4b-4281-b951-d872f2087c98
5 files changed