Allow the info bar close button to be focused by screen reader uses.
Allow the info bar close button to be focused by screen reader uses.

BUG=37360
TEST=Close button on infobar can be focused when using JAWS.

Review URL: http://codereview.chromium.org/3577001

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@61011 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser