[shill] device, service objects need to register unique paths

BUG=chromium-os:15752
TEST=unit tests

Change-Id: I54a5b1fb3e156fb62ffff0bc49a411135c01a1d0
Reviewed-on: http://gerrit.chromium.org/gerrit/1897
Reviewed-by: Chris Masone <cmasone@chromium.org>
Tested-by: Chris Masone <cmasone@chromium.org>
diff --git a/wifi.h b/wifi.h
index d962de4..b302ed9 100644
--- a/wifi.h
+++ b/wifi.h
@@ -32,8 +32,7 @@
   // called by SupplicantInterfaceProxy, in response to events from
   // wpa_supplicant.
   void BSSAdded(const ::DBus::Path &BSS,
-                const std::map<std::string, ::DBus::Variant>
-                &properties);
+                const std::map<std::string, ::DBus::Variant> &properties);
   void ScanDone();
 
  private: