diff --git a/dbus_service.h b/dbus_service.h
index 56e4ef3..71e7997 100644
--- a/dbus_service.h
+++ b/dbus_service.h
@@ -34,7 +34,7 @@
 struct UpdateEngineService {
   GObject parent_instance;
 
-  chromeos_update_engine::UpdateAttempter* update_attempter_;
+  chromeos_update_engine::SystemState* system_state_;
 };
 
 struct UpdateEngineServiceClass {
@@ -62,16 +62,40 @@
                                           int64_t* new_size,
                                           GError **error);
 
+gboolean update_engine_service_reboot_if_needed(UpdateEngineService* self,
+                                                GError **error);
+
+// TODO(jaysri): Deprecate set_track and get_track once Chrome is modified to
+// use set_channel and get_channel.
+gboolean update_engine_service_set_track(UpdateEngineService* self,
+                                         gchar* track,
+                                         GError **error);
+
 gboolean update_engine_service_get_track(UpdateEngineService* self,
                                          gchar** track,
                                          GError **error);
 
-gboolean update_engine_service_reboot_if_needed(UpdateEngineService* self,
-                                                GError **error);
+// Changes the current channel of the device to the target channel. If the
+// target channel is a less stable channel than the current channel, then the
+// channel change happens immediately (at the next update check).  If the
+// target channel is a more stable channel, then if is_powerwash_allowed is set
+// to true, then also the change happens immediately but with a powerwash if
+// required. Otherwise, the change takes effect eventually (when the version on
+// the target channel goes above the version number of what the device
+// currently has).
+gboolean update_engine_service_set_channel(UpdateEngineService* self,
+                                           gchar* target_channel,
+                                           bool is_powerwash_allowed,
+                                           GError **error);
 
-gboolean update_engine_service_set_track(UpdateEngineService* self,
-                                         gchar* track,
-                                         GError **error);
+// If get_current_channel is set to true, populates |channel| with the name of
+// the channel that the device is currently on. Otherwise, it populates it with
+// the name of the channel the device is supposed to be (in case of a pending
+// channel change).
+gboolean update_engine_service_get_channel(UpdateEngineService* self,
+                                           bool get_current_channel,
+                                           gchar** channel,
+                                           GError **error);
 
 gboolean update_engine_service_emit_status_update(
     UpdateEngineService* self,