Storage manager: Show the disk usage of other users.

chromeos/dbus/mock_cryptohome_client.h

Index: chromeos/dbus/mock_cryptohome_client.h
diff --git a/chromeos/dbus/mock_cryptohome_client.h b/chromeos/dbus/mock_cryptohome_client.h
index 1cae4f3b1ca611b5e44dfacf315b82b9a71ebc52..7dc27b9381dd38d3e64d47c7a837047218af09a3 100644
--- a/chromeos/dbus/mock_cryptohome_client.h
+++ b/chromeos/dbus/mock_cryptohome_client.h
@@ -48,6 +48,9 @@ class MockCryptohomeClient : public CryptohomeClient {
                void(const cryptohome::Identification& id_from,
                     const cryptohome::Identification& id_to,
                     const ProtobufMethodCallback& callback));
+  MOCK_METHOD2(GetAccountDiskUsage,
+               void(const cryptohome::Identification& account_id,
+                    const ProtobufMethodCallback& callback));
 
   MOCK_METHOD1(GetSystemSalt, void(const GetSystemSaltCallback& callback));
   MOCK_METHOD2(GetSanitizedUsername,