Settings to control Add Person and Browse as Guest.

chrome/browser/resources/options/browser_options.css

Index: chrome/browser/resources/options/browser_options.css
diff --git a/chrome/browser/resources/options/browser_options.css b/chrome/browser/resources/options/browser_options.css
index bc945bf644302b5106a129839a2922c446fb58b6..25d05ceb8aee894187a1cb3d4670c327b37185aa 100644
--- a/chrome/browser/resources/options/browser_options.css
+++ b/chrome/browser/resources/options/browser_options.css
@@ -459,6 +459,12 @@ div[guestmode=true] #reset-profile-settings-section {
   display: none;
 }
 
+div[supervisedMode=true] :-webkit-any(
+    #profiles-enable-guest,
+    #profiles-enable-add-person) {
+  display: none;

[Marc Treib, 2014/09/01 08:49:53]

Should these be hidden also when guestMode=true?

[Mike Lerman, 2014/09/02 16:58:29]

Not necessary, the parent container is already hidden when guestMode=true.

+}
+
 footer {
   display: flex;
 }