Storage manager: Show the disk usage of other users.

chromeos/cryptohome/mock_homedir_methods.h

Index: chromeos/cryptohome/mock_homedir_methods.h
diff --git a/chromeos/cryptohome/mock_homedir_methods.h b/chromeos/cryptohome/mock_homedir_methods.h
index b2e5e8a3a1d0f5e4c495d71cfce56dbb8df8099e..693d3f46a2fed96db072e42fb24a68219ac8fa50 100644
--- a/chromeos/cryptohome/mock_homedir_methods.h
+++ b/chromeos/cryptohome/mock_homedir_methods.h
@@ -55,6 +55,9 @@ class CHROMEOS_EXPORT MockHomedirMethods : public HomedirMethods {
                void(const Identification& id_from,
                     const Identification& id_to,
                     const Callback& callback));
+  MOCK_METHOD2(GetAccountDiskUsage,
+               void(const Identification& id,
+                    const GetAccountDiskUsageCallback& callback));
 
  private:
   bool success_;