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

chrome/browser/ui/ash/networking_config_delegate_chromeos.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/ash/networking_config_delegate_chromeos.h"
 
 #include <memory>
 #include <string>
 
 #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"
 #include "extensions/browser/api/networking_config/networking_config_service_factory.h"
 #include "extensions/browser/extension_registry.h"
 #include "extensions/common/extension.h"
 
 namespace chromeos {
 
 NetworkingConfigDelegateChromeos::NetworkingConfigDelegateChromeos() {
@@ skipping 22 matching lines @@
   std::string extension_name = LookUpExtensionName(profile, extension_id);
   if (extension_name.empty())
     return std::unique_ptr<
         const ash::NetworkingConfigDelegate::ExtensionInfo>();
   std::unique_ptr<const ash::NetworkingConfigDelegate::ExtensionInfo>
   extension_info(new const ash::NetworkingConfigDelegate::ExtensionInfo(
       extension_id, extension_name));
   return extension_info;
 }
 
+bool NetworkingConfigDelegateChromeos::HasDefaultNetworkProxyConfigured() {
+  return NetworkStateInformer::HasDefaultNetworkProxyConfigured();

[stevenjb, 2017/04/20 23:44:55]

It looks like the code in
NetworkStateInformer::HasDefaultNetworkProxyConfigured() could be moved to
src/chromeos/network, maybe src/chromeos/network/network_util.cc ? Then we could
avoid using a delegate.

[sammiequon, 2017/04/21 00:05:32]

I think the problem is the g_browser_process in
NetworkStateInformer::HasDefaultNetworkProxyConfigured(). We can't get
chrome/browser code into ash/ or chromeos/ right? 

+}
+
 std::string NetworkingConfigDelegateChromeos::LookUpExtensionName(
     content::BrowserContext* context,
     std::string extension_id) const {
   extensions::ExtensionRegistry* extension_registry =
       extensions::ExtensionRegistry::Get(context);
   DCHECK(extension_registry);
   const extensions::Extension* extension = extension_registry->GetExtensionById(
       extension_id, extensions::ExtensionRegistry::ENABLED);
   if (extension == nullptr)
     return std::string();
   return extension->name();
 }
 
 }  // namespace chromeos