Revert of 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 0538e227e87c6bef3e94f3c4bbac2b71a6e35f7b..f1a9cc0f11d5a3bfcc1d2558562885279ae74d4a 100644
--- a/content/browser/payments/payment_manager.cc
+++ b/content/browser/payments/payment_manager.cc
@@ -66,32 +66,6 @@
       scope_, instrument_key, callback);
 }
 
-void PaymentManager::GetPaymentInstrument(
-    const std::string& instrument_key,
-    const PaymentManager::GetPaymentInstrumentCallback& callback) {
-  DCHECK_CURRENTLY_ON(BrowserThread::IO);
-
-  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 PaymentManager::HasPaymentInstrumentCallback& callback) {
-  DCHECK_CURRENTLY_ON(BrowserThread::IO);
-
-  payment_app_context_->payment_app_database()->HasPaymentInstrument(
-      scope_, instrument_key, callback);
-}
-
 void PaymentManager::SetPaymentInstrument(
     const std::string& instrument_key,
     payments::mojom::PaymentInstrumentPtr details,
@@ -102,6 +76,24 @@
       scope_, instrument_key, std::move(details), callback);
 }
 
+void PaymentManager::HasPaymentInstrument(
+    const std::string& instrument_key,
+    const HasPaymentInstrumentCallback& callback) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+
+  payment_app_context_->payment_app_database()->HasPaymentInstrument(
+      scope_, instrument_key, callback);
+}
+
+void PaymentManager::GetPaymentInstrument(
+    const std::string& instrument_key,
+    const PaymentManager::GetPaymentInstrumentCallback& callback) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+
+  payment_app_context_->payment_app_database()->ReadPaymentInstrument(
+      scope_, instrument_key, callback);
+}
+
 void PaymentManager::OnConnectionError() {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   payment_app_context_->PaymentManagerHadConnectionError(this);