[shill] Start replacing bare pointers with scoped_refptrs where appropriate

BUG=chromium-os:16259
TEST=unit tests

Change-Id: I5e1531b726bbb40917d25dc3ae44da9a6a420e00
Reviewed-on: http://gerrit.chromium.org/gerrit/2236
Tested-by: Chris Masone <cmasone@chromium.org>
Reviewed-by: Darin Petkov <petkov@chromium.org>
diff --git a/manager_unittest.cc b/manager_unittest.cc
index 18041af..97643cf 100644
--- a/manager_unittest.cc
+++ b/manager_unittest.cc
@@ -30,7 +30,7 @@
   }
 
   bool IsDeviceRegistered(Device *device, Device::Technology tech) {
-    vector<scoped_refptr<Device> > devices;
+    vector<DeviceRefPtr> devices;
     manager_.FilterByTechnology(tech, &devices);
     return (devices.size() == 1 && devices[0].get() == device);
   }