Add a HostContentSettingsMap layer for Supervised Users.

components/content_settings/core/common/pref_names.cc

 // Copyright 2014 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 "components/content_settings/core/common/pref_names.h"
 
 namespace prefs {
 
 // Version of the pattern format used to define content settings.
 const char kContentSettingsVersion[] = "profile.content_settings.pref_version";
@@ skipping 60 matching lines @@
     "profile.managed_popups_allowed_for_urls";
 const char kManagedPopupsBlockedForUrls[] =
     "profile.managed_popups_blocked_for_urls";
 const char kManagedNotificationsAllowedForUrls[] =
     "profile.managed_notifications_allowed_for_urls";
 const char kManagedNotificationsBlockedForUrls[] =
     "profile.managed_notifications_blocked_for_urls";
 const char kManagedAutoSelectCertificateForUrls[] =
     "profile.managed_auto_select_certificate_for_urls";
 
+const char kSupervisedGeolocationDisabled[] =

[Bernhard Bauer, 2015/02/05 12:07:52]

As previously discussed offline, I'm not sure if going through prefs here makes
anything easier. You could just as well directly observe the
SupervisedUserSettingsService instead.

[knn, 2015/02/26 12:07:30]

Done.

+    "profile.supervised_geolocation_disabled";
+const char kSupervisedCameraMicDisabled[] =
+    "profile.supervised_camera_mic_disabled";
+
 }  // namespace prefs