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 37d5593a479ebcbdb9b22a057a13cc7ccae0482f..15baacd8aeb2f9b6ce358cb9d2b86f6812f75082 100644
--- a/chrome/browser/ui/ash/system_tray_delegate_linux.cc
+++ b/chrome/browser/ui/ash/system_tray_delegate_linux.cc
@@ -287,6 +287,14 @@ class SystemTrayDelegateLinux : public ash::SystemTrayDelegate,
     return NULL;
   }
 
+  virtual void AddCustodianInfoTrayObserver(
+    ash::CustodianInfoTrayObserver* observer) override {
+  }
+
+  virtual void RemoveCustodianInfoTrayObserver(
+    ash::CustodianInfoTrayObserver* observer) override {
+  }
+
  private:
   ash::SystemTrayNotifier* GetSystemTrayNotifier() {
     return ash::Shell::GetInstance()->system_tray_notifier();