shill: wifi cleanups

three cleanups:
- WiFi and WiFiService: rename deferred task handlers (RealScanDone
  and RealConnect) from Real<Func> to <Func>Task. this makes them
  consistent with the naming in Modem.

- WiFiMainTest:
  - use scoped_ptrs (rather than bare) for references to mock
    proxies. this simplifies memory management, and makes WiFiMainTest
    more consistent with DHCPConfigTest
  - eliminate "uninteresting mock function call" messages

BUG=chromium-os:18349
TEST=FEATURES="test nostrip noclean" emerge-x86-generic shill

Change-Id: Ia4f340ab861c5a0ae44a730ca3e1a664ca03180a
Reviewed-on: http://gerrit.chromium.org/gerrit/4939
Reviewed-by: mukesh agrawal <quiche@chromium.org>
Tested-by: mukesh agrawal <quiche@chromium.org>
diff --git a/wifi.h b/wifi.h
index 470116e..379e173 100644
--- a/wifi.h
+++ b/wifi.h
@@ -56,7 +56,7 @@
   static const char kSupplicantPropertyKeyMode[];
   static const char kSupplicantKeyModeNone[];
 
-  void RealScanDone();
+  void ScanDoneTask();
 
   static unsigned int service_id_serial_;
   ScopedRunnableMethodFactory<WiFi> task_factory_;