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

chrome/browser/ui/ash/networking_config_delegate_chromeos.cc

Index: chrome/browser/ui/ash/networking_config_delegate_chromeos.cc
diff --git a/chrome/browser/ui/ash/networking_config_delegate_chromeos.cc b/chrome/browser/ui/ash/networking_config_delegate_chromeos.cc
index 29cbba18ce99de1d2a0c43de6ce424a549ee3feb..d7a32227030b06b6fec341f5afd788e18e9e2679 100644
--- a/chrome/browser/ui/ash/networking_config_delegate_chromeos.cc
+++ b/chrome/browser/ui/ash/networking_config_delegate_chromeos.cc
@@ -9,6 +9,7 @@
 
 #include "base/strings/string_number_conversions.h"
 #include "chrome/browser/profiles/profile_manager.h"
+#include "chrome/browser/ui/webui/chromeos/login/network_state_informer.h"
 #include "chromeos/network/network_state.h"
 #include "chromeos/network/network_state_handler.h"
 #include "extensions/browser/api/networking_config/networking_config_service.h"
@@ -51,6 +52,10 @@ NetworkingConfigDelegateChromeos::LookUpExtensionForNetwork(
   return extension_info;
 }
 
+bool NetworkingConfigDelegateChromeos::HasDefaultNetworkProxyConfigured() {
+  return NetworkStateInformer::HasDefaultNetworkProxyConfigured();
+}
+
 std::string NetworkingConfigDelegateChromeos::LookUpExtensionName(
     content::BrowserContext* context,
     std::string extension_id) const {