Reland: chromeos: Convert ash VPNDelegate interface to mojo

ash/common/wm_shell.cc

Index: ash/common/wm_shell.cc
diff --git a/ash/common/wm_shell.cc b/ash/common/wm_shell.cc
index 7217026ade7875e520c3a19ff888bab87237d4ab..5af6bc9777796f77cf685287f6eb91f23d4bf896 100644
--- a/ash/common/wm_shell.cc
+++ b/ash/common/wm_shell.cc
@@ -52,6 +52,7 @@
 #if defined(OS_CHROMEOS)
 #include "ash/common/system/chromeos/brightness/brightness_controller_chromeos.h"
 #include "ash/common/system/chromeos/keyboard_brightness_controller.h"
+#include "ash/common/system/chromeos/network/vpn_list.h"
 #include "ash/common/system/chromeos/session/logout_confirmation_controller.h"
 #endif
 
@@ -264,6 +265,7 @@ WmShell::WmShell(std::unique_ptr<ShellDelegate> shell_delegate)
 #if defined(OS_CHROMEOS)
   brightness_control_delegate_.reset(new system::BrightnessControllerChromeos);
   keyboard_brightness_control_delegate_.reset(new KeyboardBrightnessController);
+  vpn_list_ = base::MakeUnique<VpnList>();
 #endif
 }