Extend vpnProvider to allow reconnections

chromeos/network/network_state.h

Index: chromeos/network/network_state.h
diff --git a/chromeos/network/network_state.h b/chromeos/network/network_state.h
index 6128a628f3120363596491976301f9d56da486c3..24bb8c0d29eaa69c3191c6371a5c171bfd705041 100644
--- a/chromeos/network/network_state.h
+++ b/chromeos/network/network_state.h
@@ -107,6 +107,10 @@ class CHROMEOS_EXPORT NetworkState : public ManagedState {
   bool IsConnectedState() const;
   bool IsConnectingState() const;
 
+  // Returns true if |last_connection_state_| is connected, and
+  // |connection_state_| is connecting.
+  bool IsReconnecting() const;
+
   // Returns true if this is a network stored in a profile.
   bool IsInProfile() const;
 
@@ -161,6 +165,7 @@ class CHROMEOS_EXPORT NetworkState : public ManagedState {
   std::string device_path_;
   std::string guid_;
   std::string connection_state_;
+  std::string last_connection_state_;
   std::string profile_path_;
   std::vector<uint8_t> raw_ssid_;  // Unknown encoding. Not necessarily UTF-8.
   int priority_ = 0;