Fix to make OOBE update screen speak
Fix to make OOBE update screen speak

BUG=chromium-os:18897
TEST=Turn on accessibility on the OOBE screen by pressing Ctrl+Alt+z.  Continue to the update page.  Ensure that it's spoken.

Review URL: http://codereview.chromium.org/7606021

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@96146 0039d316-1c4b-4281-b951-d872f2087c98

gavinp/chromium,ropik/chromium,adobe/chromium,gavinp/chromium,adobe/chromium,adobe/chromium,yitian134/chromium,yitian134/chromium,gavinp/chromium,adobe/chromium,adobe/chromium,ropik/chromium,yitian134/chromium,yitian134/chromium,gavinp/chromium,ropik/chromium,yitian134/chromium,ropik/chromium,gavinp/chromium,ropik/chromium,gavinp/chromium,adobe/chromium,ropik/chromium,adobe/chromium,ropik/chromium,yitian134/chromium,yitian134/chromium,ropik/chromium,yitian134/chromium,gavinp/chromium,adobe/chromium,adobe/chromium,yitian134/chromium,adobe/chromium,gavinp/chromium,yitian134/chromium,adobe/chromium,gavinp/chromium,gavinp/chromium,ropik/chromium