Revert of chromeos: Convert ash VPNDelegate interface to mojo

chrome/browser/ui/ash/system_tray_delegate_chromeos.cc

Index: chrome/browser/ui/ash/system_tray_delegate_chromeos.cc
diff --git a/chrome/browser/ui/ash/system_tray_delegate_chromeos.cc b/chrome/browser/ui/ash/system_tray_delegate_chromeos.cc
index d07ce2fa923a24906645d66ff2193cbaebc095d7..10d7a7f22ed3a50c7def9fcd640bff0bacb9bdc1 100644
--- a/chrome/browser/ui/ash/system_tray_delegate_chromeos.cc
+++ b/chrome/browser/ui/ash/system_tray_delegate_chromeos.cc
@@ -59,6 +59,7 @@
 #include "chrome/browser/ui/ash/networking_config_delegate_chromeos.h"
 #include "chrome/browser/ui/ash/system_tray_client.h"
 #include "chrome/browser/ui/ash/system_tray_delegate_utils.h"
+#include "chrome/browser/ui/ash/vpn_delegate_chromeos.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/chrome_pages.h"
@@ -144,6 +145,7 @@
 SystemTrayDelegateChromeOS::SystemTrayDelegateChromeOS()
     : cast_config_delegate_(base::MakeUnique<CastConfigDelegateMediaRouter>()),
       networking_config_delegate_(new NetworkingConfigDelegateChromeos()),
+      vpn_delegate_(new VPNDelegateChromeOS),
       weak_ptr_factory_(this) {
   // Register notifications on construction so that events such as
   // PROFILE_CREATED do not get missed if they happen before Initialize().
@@ -586,6 +588,10 @@
 void SystemTrayDelegateChromeOS::RemoveCustodianInfoTrayObserver(
     ash::CustodianInfoTrayObserver* observer) {
   custodian_info_changed_observers_.RemoveObserver(observer);
+}
+
+ash::VPNDelegate* SystemTrayDelegateChromeOS::GetVPNDelegate() const {
+  return vpn_delegate_.get();
 }
 
 std::unique_ptr<ash::SystemTrayItem>