PaymentHandler: Implement PaymentInstruments.keys().

content/browser/payments/payment_manager.cc

Index: content/browser/payments/payment_manager.cc
diff --git a/content/browser/payments/payment_manager.cc b/content/browser/payments/payment_manager.cc
index f1a9cc0f11d5a3bfcc1d2558562885279ae74d4a..0538e227e87c6bef3e94f3c4bbac2b71a6e35f7b 100644
--- a/content/browser/payments/payment_manager.cc
+++ b/content/browser/payments/payment_manager.cc
@@ -66,32 +66,40 @@ void PaymentManager::DeletePaymentInstrument(
       scope_, instrument_key, callback);
 }
 
-void PaymentManager::SetPaymentInstrument(
+void PaymentManager::GetPaymentInstrument(
     const std::string& instrument_key,
-    payments::mojom::PaymentInstrumentPtr details,
-    const PaymentManager::SetPaymentInstrumentCallback& callback) {
+    const PaymentManager::GetPaymentInstrumentCallback& callback) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
-  payment_app_context_->payment_app_database()->WritePaymentInstrument(
-      scope_, instrument_key, std::move(details), callback);
+  payment_app_context_->payment_app_database()->ReadPaymentInstrument(
+      scope_, instrument_key, callback);
+}
+
+void PaymentManager::KeysOfPaymentInstruments(
+    const PaymentManager::KeysOfPaymentInstrumentsCallback& callback) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+
+  payment_app_context_->payment_app_database()->KeysOfPaymentInstruments(
+      scope_, callback);
 }
 
 void PaymentManager::HasPaymentInstrument(
     const std::string& instrument_key,
-    const HasPaymentInstrumentCallback& callback) {
+    const PaymentManager::HasPaymentInstrumentCallback& callback) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
   payment_app_context_->payment_app_database()->HasPaymentInstrument(
       scope_, instrument_key, callback);
 }
 
-void PaymentManager::GetPaymentInstrument(
+void PaymentManager::SetPaymentInstrument(
     const std::string& instrument_key,
-    const PaymentManager::GetPaymentInstrumentCallback& callback) {
+    payments::mojom::PaymentInstrumentPtr details,
+    const PaymentManager::SetPaymentInstrumentCallback& callback) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
-  payment_app_context_->payment_app_database()->ReadPaymentInstrument(
-      scope_, instrument_key, callback);
+  payment_app_context_->payment_app_database()->WritePaymentInstrument(
+      scope_, instrument_key, std::move(details), callback);
 }
 
 void PaymentManager::OnConnectionError() {