Prevent usage of web payments API over insecure HTTPS.

components/payments/content/payment_request_state.cc

Index: components/payments/content/payment_request_state.cc
diff --git a/components/payments/content/payment_request_state.cc b/components/payments/content/payment_request_state.cc
index c3f152640f2dfc5f3f3a10435ba887bfd6224670..aaf180dbc7041b0bfe7d4e3ac31cfb35b166790f 100644
--- a/components/payments/content/payment_request_state.cc
+++ b/components/payments/content/payment_request_state.cc
@@ -50,15 +50,22 @@ void PaymentRequestState::OnPaymentResponseReady(
 bool PaymentRequestState::CanMakePayment() const {
   for (const std::unique_ptr<PaymentInstrument>& instrument :
        available_instruments_) {
-    if (instrument->IsValidForCanMakePayment() &&
-        spec_->supported_card_networks_set().count(
-            instrument.get()->method_name())) {
+    if (instrument->IsValidForCanMakePayment()) {
+      // AddAutofillPaymentInstrument() filters out available instruments based
+      // on supported card networks.
+      DCHECK(spec_->supported_card_networks_set().find(
+                 instrument->method_name()) !=
+             spec_->supported_card_networks_set().end());
       return true;
     }
   }
   return false;
 }
 
+bool PaymentRequestState::AreRequestedMethodsSupported() const {
+  return !spec_->supported_card_networks().empty();
+}
+
 void PaymentRequestState::AddObserver(Observer* observer) {
   CHECK(observer);
   observers_.AddObserver(observer);