Add ManagedUserSettings Sync data type.

sync/internal_api/public/base_node.h

Index: sync/internal_api/public/base_node.h
diff --git a/sync/internal_api/public/base_node.h b/sync/internal_api/public/base_node.h
index 360292353a23ccf128b98712141fcaefab5c6f95..7cf2edb2af257ab15ebf97cb2afaa13afeccf5e9 100644
--- a/sync/internal_api/public/base_node.h
+++ b/sync/internal_api/public/base_node.h
@@ -153,6 +153,11 @@ class SYNC_EXPORT BaseNode {
   // data.  Can only be called if GetModelType() == SESSIONS.
   const sync_pb::SessionSpecifics& GetSessionSpecifics() const;
 
+  // Getter specific to the MANAGED_USER_SETTINGS datatype.  Returns protobuf
+  // data.  Can only be called if GetModelType() == MANAGED_USER_SETTINGS.
+  const sync_pb::ManagedUserSettingSpecifics&
+      GetManagedUserSettingSpecifics() const;
+
   // Getter specific to the DEVICE_INFO datatype.  Returns protobuf
   // data.  Can only be called if GetModelType() == DEVICE_INFO.
   const sync_pb::DeviceInfoSpecifics& GetDeviceInfoSpecifics() const;