Convert TrayVPN to use new NetworkState code

ash/system/chromeos/network/network_icon.h

Index: ash/system/chromeos/network/network_icon.h
diff --git a/ash/system/chromeos/network/network_icon.h b/ash/system/chromeos/network/network_icon.h
index 06c24912800ba609cdb1c25db0e968940bc07b42..9ea5b7fdfb464348d0ffd9b76848f919344611c1 100644
--- a/ash/system/chromeos/network/network_icon.h
+++ b/ash/system/chromeos/network/network_icon.h
@@ -44,6 +44,10 @@ gfx::ImageSkia GetImageForDisconnectedNetwork(IconType icon_type,
 string16 GetLabelForNetwork(const chromeos::NetworkState* network,
                             IconType icon_type);
 
+// Updates and returns the appropriate message id if the cellular network
+// is uninitialized.
+int GetCellularUninitializedMsg();

[stevenjb, 2013/03/02 03:14:45]

Since network_icon handles most other network related messages (it could really
be named network_icon_and_text, but that's kind of a mouthful), this seemed like
as good a place as any for this. It's used by both NetworkStateListDetailedView,
which is not persistent, and by TrayNetwork, but NetworkStateListDetailedView no
longer knows details about TrayNetwork and might be spawned by TrayVpn.

+
 }  // namespace network_icon
 }  // namespace ash