shill: Obtain the payment and usage URLs from ModemManager.

BUG=chromium-os:19240
TEST=unit tests, tested on device

Change-Id: I98d800cd69684bdf9c201348c00ff79152e51e45
Reviewed-on: http://gerrit.chromium.org/gerrit/6106
Tested-by: Darin Petkov <petkov@chromium.org>
Reviewed-by: Chris Masone <cmasone@chromium.org>
Reviewed-by: Jason Glasgow <jglasgow@chromium.org>
diff --git a/modem_cdma_proxy_interface.h b/modem_cdma_proxy_interface.h
index 04f058e..9a91f3e 100644
--- a/modem_cdma_proxy_interface.h
+++ b/modem_cdma_proxy_interface.h
@@ -26,6 +26,10 @@
  public:
   virtual ~ModemCDMAProxyListener() {}
 
+  virtual void OnCDMAActivationStateChanged(
+      uint32 activation_state,
+      uint32 activation_error,
+      const DBusPropertiesMap &status_changes) = 0;
   virtual void OnCDMARegistrationStateChanged(uint32 state_1x,
                                               uint32 state_evdo) = 0;
   virtual void OnCDMASignalQualityChanged(uint32 strength) = 0;