Settings to control Add Person and Browse as Guest.

chrome/browser/ui/webui/signin/user_manager_screen_handler.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/webui/signin/user_manager_screen_handler.h"
 
 #include "base/bind.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/value_conversions.h"
@@ skipping 132 matching lines @@
   return extensions::ScreenlockPrivateEventRouter::GetFactoryInstance()->Get(
       profile);
 }
 
 bool IsGuestModeEnabled() {
   PrefService* service = g_browser_process->local_state();
   DCHECK(service);
   return service->GetBoolean(prefs::kBrowserGuestModeEnabled);
 }
 
+bool IsAddPersonEnabled() {
+  PrefService* service = g_browser_process->local_state();
+  DCHECK(service);
+  return service->GetBoolean(prefs::kBrowserAddPersonEnabled);
+}
+
 }  // namespace
 
 // ProfileUpdateObserver ------------------------------------------------------
 
 class UserManagerScreenHandler::ProfileUpdateObserver
     : public ProfileInfoCacheObserver {
  public:
   ProfileUpdateObserver(
       ProfileManager* profile_manager, UserManagerScreenHandler* handler)
       : profile_manager_(profile_manager),
@@ skipping 121 matching lines @@
       info_cache, base::UTF8ToUTF16(user_email), base::string16());
   DCHECK_LT(profile_index, info_cache.GetNumberOfProfiles());
 
   authenticating_profile_index_ = profile_index;
   ReportAuthenticationResult(true, ProfileMetrics::AUTH_LOCAL);
 }
 
 void UserManagerScreenHandler::HandleInitialize(const base::ListValue* args) {
   SendUserList();
   web_ui()->CallJavascriptFunction("cr.ui.Oobe.showUserManagerScreen",
-      base::FundamentalValue(IsGuestModeEnabled()));
+      base::FundamentalValue(IsGuestModeEnabled()),
+      base::FundamentalValue(IsAddPersonEnabled()));
   desktop_type_ = chrome::GetHostDesktopTypeForNativeView(
       web_ui()->GetWebContents()->GetNativeView());
 
   ScreenlockBridge::Get()->SetLockHandler(this);
 }
 
 void UserManagerScreenHandler::HandleAddUser(const base::ListValue* args) {
-  profiles::CreateAndSwitchToNewProfile(desktop_type_,
-                                        base::Bind(&OnSwitchToProfileComplete),
-                                        ProfileMetrics::ADD_NEW_USER_MANAGER);
+  if (IsAddPersonEnabled()) {

[Evan Stade, 2014/08/30 01:15:37]

nit: invert this check and return early

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

Done.

+    profiles::CreateAndSwitchToNewProfile(
+        desktop_type_,
+        base::Bind(&OnSwitchToProfileComplete),
+        ProfileMetrics::ADD_NEW_USER_MANAGER);
+  } else {
+    // The UI should have prevented the user from adding a user.
+    NOTREACHED();
+  }
 }
 
 void UserManagerScreenHandler::HandleAuthenticatedLaunchUser(
     const base::ListValue* args) {
   base::string16 email_address;
   if (!args->GetString(0, &email_address))
     return;
 
   base::string16 display_name;
   if (!args->GetString(1, &display_name))
@@ skipping 358 matching lines @@
   } else {
     web_ui()->CallJavascriptFunction(
         "cr.ui.Oobe.showSignInError",
         base::FundamentalValue(0),
         base::StringValue(
             l10n_util::GetStringUTF8(IDS_LOGIN_ERROR_AUTHENTICATING)),
         base::StringValue(""),
         base::FundamentalValue(0));
   }
 }