Add/update images for people search.
This CL adds and updades the images for the people search CL that adds chat (https://codereview.chromium.org/26048003/).

R=oshima@chromium.org
BUG=302805

Review URL: https://codereview.chromium.org/26052002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227128 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 227128