Make sure that user removal menu is not overlapped with user pods

Based on https://chromiumcodereview.appspot.com/18109002 but w/o css changes for podrow

BUG=253523
NOTRY=true

Review URL: https://chromiumcodereview.appspot.com/24096028

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224711 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 224711