Add ManagedUserSharedSettingsService.

chrome/common/pref_names.cc

Index: chrome/common/pref_names.cc
diff --git a/chrome/common/pref_names.cc b/chrome/common/pref_names.cc
index b77aa73e7c2024dc842ec557d0abd1bfca522458..f73a5aa67dfb826d9bdb56a3b206ec7f4cbfbb24 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -47,6 +47,11 @@ const char kManagedUserCustodianEmail[] = "profile.managed.custodian_email";
 // starts a session.
 const char kManagedUserCustodianName[] = "profile.managed.custodian_name";
 
+// Stores settings that can be modified both by a supervised user and their
+// manager. See ManagedUserSharedSettingsService for a description of
+// the format.
+const char kManagedUserSharedSettings[] = "profile.managed.shared_settings";
+
 // An integer that keeps track of the profile icon version. This allows us to
 // determine the state of the profile icon for icon format changes.
 const char kProfileIconVersion[] = "profile.icon_version";