arc: update proxy settings from UI and ONC policy.

chrome/browser/chromeos/proxy_config_service_impl.h

Index: chrome/browser/chromeos/proxy_config_service_impl.h
diff --git a/chrome/browser/chromeos/proxy_config_service_impl.h b/chrome/browser/chromeos/proxy_config_service_impl.h
index 93586a08c2b6695d7b5f5bcf134eef67e4628ac2..ca98371ac41008a787fb6d2afe5b17471ea25c62 100644
--- a/chrome/browser/chromeos/proxy_config_service_impl.h
+++ b/chrome/browser/chromeos/proxy_config_service_impl.h
@@ -54,9 +54,6 @@ class ProxyConfigServiceImpl : public PrefProxyConfigTrackerImpl,
   void DefaultNetworkChanged(const NetworkState* network) override;
   void OnShuttingDown() override;
 
- protected:
-  friend class UIProxyConfigService;
-
   // Returns true if proxy is to be ignored for this network profile and
   // |onc_source|, e.g. this happens if the network is shared and
   // use-shared-proxies is turned off. |profile_prefs| may be NULL.