Added dbus bindings for new cryptohomed attestation APIs.

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 5a683704be82f67143cf1e39b8f6b22bc84ea6a0..2563aac43629a004dcd5a5b816959de12737db8b 100644
--- a/chromeos/dbus/mock_cryptohome_client.h
+++ b/chromeos/dbus/mock_cryptohome_client.h
@@ -120,6 +120,15 @@ class MockCryptohomeClient : public CryptohomeClient {
                     const std::string& key_name,
                     const std::string& challenge,
                     const AsyncMethodCallback& callback));
+  MOCK_METHOD3(TpmAttestationGetKeyPayload,
+               void(AttestationKeyType key_type,
+                    const std::string& key_name,
+                    const DataMethodCallback& callback));
+  MOCK_METHOD4(TpmAttestationSetKeyPayload,
+               void(AttestationKeyType key_type,
+                    const std::string& key_name,
+                    const std::string& payload,
+                    const BoolDBusMethodCallback& callback));
 };
 
 }  // namespace chromeos