PaymentHandler: Implement GetAllPaymentApps().

content/public/browser/stored_payment_instrument.cc

Index: content/public/browser/stored_payment_instrument.cc
diff --git a/content/public/browser/stored_payment_instrument.cc b/content/public/browser/stored_payment_instrument.cc
new file mode 100644
index 0000000000000000000000000000000000000000..915e80f5d470a6a5c7d725b00e1d5458066815cf
--- /dev/null
+++ b/content/public/browser/stored_payment_instrument.cc
@@ -0,0 +1,13 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "content/public/browser/stored_payment_instrument.h"
+
+namespace content {
+
+StoredPaymentInstrument::StoredPaymentInstrument() = default;
+
+StoredPaymentInstrument::~StoredPaymentInstrument() = default;
+
+}  // namespace content