GitLab

BUG=10411018
TEST=Manual: notice that tab navigation now always works for buttons in top-right corner of filebrowser(earlier it didn't work after showing-hiding any modal dialog).

Review URL: https://chromiumcodereview.appspot.com/10409093

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@138477 0039d316-1c4b-4281-b951-d872f2087c98