PaymentHandler: Implement GetAllPaymentApps().

content/public/browser/payment_instrument.cc

Index: content/public/browser/payment_instrument.cc
diff --git a/content/browser/indexed_db/leveldb/leveldb_iterator.cc b/content/public/browser/payment_instrument.cc
similarity index 57%
copy from content/browser/indexed_db/leveldb/leveldb_iterator.cc
copy to content/public/browser/payment_instrument.cc
index 37ac97a2904708803528b5e12e88c2943e014af7..5a1d8d5d3785c244a39c5637758418b005410488 100644
--- a/content/browser/indexed_db/leveldb/leveldb_iterator.cc
+++ b/content/public/browser/payment_instrument.cc
@@ -2,12 +2,12 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "content/browser/indexed_db/leveldb/leveldb_iterator.h"
+#include "content/public/browser/payment_instrument.h"
 
 namespace content {
 
-bool LevelDBIterator::IsDetached() const {
-  return false;
-}
+PaymentInstrument::PaymentInstrument() = default;
+
+PaymentInstrument::~PaymentInstrument() = default;
 
 }  // namespace content