Enable ChromeVox on the OOBE screens when using the keyboard shortcut.
Enable ChromeVox on the OOBE screens when using the keyboard shortcut.

R=dmazzoni
BUG=chromium-os:14804
TEST=Press ctrl+alt+z on the OOBE screen to enable accessibility.  Continue to the Terms of service page.  Press tab to move focus to the DOM view.  Press shift + space + down to navigate the EULA.  Ensure that it's spoken.

Review URL: http://codereview.chromium.org/7609001

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@96136 0039d316-1c4b-4281-b951-d872f2087c98

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