shill: Connect the device on start when the modem is already connected.

BUG=chromium-os:18727
TEST=unit tests, tested on device

Change-Id: I9657cfd4423fa17c2f34973df5880db520a8662c
Reviewed-on: http://gerrit.chromium.org/gerrit/5584
Tested-by: Darin Petkov <petkov@chromium.org>
Reviewed-by: Chris Masone <cmasone@chromium.org>
diff --git a/modem.h b/modem.h
index 78a1e97..71af22c 100644
--- a/modem.h
+++ b/modem.h
@@ -49,6 +49,7 @@
 
   static const char kPropertyLinkName[];
   static const char kPropertyIPMethod[];
+  static const char kPropertyState[];
   static const char kPropertyType[];
   static const char kPropertyUnlockRequired[];
   static const char kPropertyUnlockRetries[];