Adding infrastructure for possibility of changing manager names for the supervised accounts.

chrome/browser/ui/ash/system_tray_delegate_linux.cc

Index: chrome/browser/ui/ash/system_tray_delegate_linux.cc
diff --git a/chrome/browser/ui/ash/system_tray_delegate_linux.cc b/chrome/browser/ui/ash/system_tray_delegate_linux.cc
index 8c3ee83462e3772af45b6b25bf88841d331a222e..599e6e4672768ebbe3281405720ec844a4da9166 100644
--- a/chrome/browser/ui/ash/system_tray_delegate_linux.cc
+++ b/chrome/browser/ui/ash/system_tray_delegate_linux.cc
@@ -286,6 +286,10 @@ class SystemTrayDelegateLinux : public ash::SystemTrayDelegate,
     return NULL;
   }
 
+  virtual void AddCustodianInfoChangedCallback(
+      const base::Closure& /*callback*/) OVERRIDE {
+  }
+
  private:
   ash::SystemTrayNotifier* GetSystemTrayNotifier() {
     return ash::Shell::GetInstance()->system_tray_notifier();