tray: Show warning in network tray when VPN or proxy used.

chromeos/network/proxy/ui_proxy_config_service.h

Index: chromeos/network/proxy/ui_proxy_config_service.h
diff --git a/chromeos/network/proxy/ui_proxy_config_service.h b/chromeos/network/proxy/ui_proxy_config_service.h
index c3e1f508006ea438e34b816e9c96eab060e21e40..2b9b61d959b5f23614bb7df3318422b9d2aeb654 100644
--- a/chromeos/network/proxy/ui_proxy_config_service.h
+++ b/chromeos/network/proxy/ui_proxy_config_service.h
@@ -50,6 +50,8 @@ class CHROMEOS_EXPORT UIProxyConfigService {
   void SetProxyConfig(const std::string& network_guid,
                       const UIProxyConfig& config);
 
+  bool HasDefaultNetworkProxyConfigured();

[stevenjb, 2017/04/21 18:38:25]

Please document:

// Returns true if there is a default network and it has a proxy
// configuration with mode == MODE_FIXED_SERVERS.

[sammiequon, 2017/04/21 19:02:53]

Done.

+
  private:
   // Determines effective proxy config based on prefs from config tracker,
   // |network| and if user is using shared proxies.  The effective config is