Change strings according to UI feedback.

BUG=295508,295513
NOTRY=True

Review URL: https://chromiumcodereview.appspot.com/24313003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224701 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 224701