AU: Provide a D-Bus API for changing the update track.
The method is SetTrack(string). It doesn't do anything right now but hopefully
this CL will enable work on libcros.
BUG=8104
TEST=unit tests; tested on device through update_engine_client.
Change-Id: I6941fe3d04165d85c4612e3a01939d02c02014f9
Review URL: http://codereview.chromium.org/4094001
diff --git a/update_engine.xml b/update_engine.xml
index 88e6871..73bc92e 100644
--- a/update_engine.xml
+++ b/update_engine.xml
@@ -20,6 +20,9 @@
</method>
<method name="RebootIfNeeded">
</method>
+ <method name="SetTrack">
+ <arg type="s" name="track" />
+ </method>
<signal name="StatusUpdate">
<arg type="x" name="last_checked_time" />
<arg type="d" name="progress" />