shill: add unittests for wifi

BUG=chromium-os:16785,chromium-os:16419
TEST=FEATURES="test nostrip noclean" emerge-x86-generic shill

Change-Id: I2a681a8f3ab291089d4622dabbbbd1a6ec42bdb8
Reviewed-on: http://gerrit.chromium.org/gerrit/4411
Tested-by: mukesh agrawal <quiche@chromium.org>
Reviewed-by: Darin Petkov <petkov@chromium.org>
diff --git a/supplicant_process_proxy_interface.h b/supplicant_process_proxy_interface.h
index c3a60c1..d30c065 100644
--- a/supplicant_process_proxy_interface.h
+++ b/supplicant_process_proxy_interface.h
@@ -19,8 +19,8 @@
   virtual ~SupplicantProcessProxyInterface() {}
   virtual ::DBus::Path CreateInterface(
       const std::map<std::string, ::DBus::Variant> &args) = 0;
-  virtual void RemoveInterface(const ::DBus::Path &path) = 0;
   virtual ::DBus::Path GetInterface(const std::string &ifname) = 0;
+  virtual void RemoveInterface(const ::DBus::Path &path) = 0;
 };
 
 }  // namespace shill