client: Replace DBus client generated method names.

The dbus-binding-tool uses a different annotation name to specify
the C Symbol of a method when generating the interface .h file from
the .xml file. For the server side, the
org.freedesktop.DBus.GLib.CSymbol is used while for the client side
org.freedesktop.DBus.GLib.ClientCSymbol is used.

This fix adds the client annotation C Symbol and replaces all the
function calls to those functions.

BUG=None
TEST=Code compiles. Generated names are correct.

Change-Id: Ibc9c6c343e618fb2c455f61f89e06c58f9551656
Reviewed-on: https://chromium-review.googlesource.com/167525
Reviewed-by: David Zeuthen <zeuthen@chromium.org>
Tested-by: Alex Deymo <deymo@chromium.org>
Commit-Queue: Alex Deymo <deymo@chromium.org>
diff --git a/update_engine.xml b/update_engine.xml
index 0d9f895..44b7a7c 100644
--- a/update_engine.xml
+++ b/update_engine.xml
@@ -7,6 +7,8 @@
   <interface name="org.chromium.UpdateEngineInterface">
     <annotation name="org.freedesktop.DBus.GLib.CSymbol"
                 value="update_engine_service"/>
+    <annotation name="org.freedesktop.DBus.GLib.ClientCSymbol"
+                value="update_engine_client"/>
     <method name="AttemptUpdate">
       <arg type="s" name="app_version" />
       <arg type="s" name="omaha_url" />
@@ -36,11 +38,15 @@
     <method name="SetP2PUpdatePermission">
       <annotation name="org.freedesktop.DBus.GLib.CSymbol"
         value="update_engine_service_set_p2p_update_permission"/>
+      <annotation name="org.freedesktop.DBus.GLib.ClientCSymbol"
+        value="update_engine_client_set_p2p_update_permission"/>
       <arg type="b" name="enabled" />
     </method>
     <method name="GetP2PUpdatePermission">
       <annotation name="org.freedesktop.DBus.GLib.CSymbol"
         value="update_engine_service_get_p2p_update_permission"/>
+      <annotation name="org.freedesktop.DBus.GLib.ClientCSymbol"
+        value="update_engine_client_get_p2p_update_permission"/>
       <arg type="b" name="enabled" direction="out" />
     </method>
     <method name="SetUpdateOverCellularPermission">