GitLab

Synthetic KeyEvent delivery, part I.

This delivers synthetic key events to the views hierarchy. This
currently does nothing, as nothing is listening for the event in
TOUCH_UI (or elsewhere). That part will come later.

BUG=none
TEST=unit test for key identifier conversion + manual for extension
api

Review URL: http://codereview.chromium.org/3130029

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@56886 0039d316-1c4b-4281-b951-d872f2087c98