[Payments] Field trial and flag to abort payment request if no card.

chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentRequestImpl.java

Index: chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentRequestImpl.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentRequestImpl.java b/chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentRequestImpl.java
index fc50efa517ca5fb0e8737621d5e533f069582163..cf44b7938f404cb020e51d94979e679ccc4bc069 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentRequestImpl.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentRequestImpl.java
@@ -18,6 +18,7 @@ import org.chromium.base.VisibleForTesting;
 import org.chromium.base.metrics.RecordHistogram;
 import org.chromium.chrome.R;
 import org.chromium.chrome.browser.ChromeActivity;
+import org.chromium.chrome.browser.ChromeFeatureList;
 import org.chromium.chrome.browser.autofill.PersonalDataManager;
 import org.chromium.chrome.browser.autofill.PersonalDataManager.AutofillProfile;
 import org.chromium.chrome.browser.autofill.PersonalDataManager.NormalizedAddressRequestDelegate;
@@ -1034,10 +1035,12 @@ public class PaymentRequestImpl implements PaymentRequest, PaymentRequestUI.Clie
         boolean waitingForPaymentApps = !mPendingApps.isEmpty() || !mPendingInstruments.isEmpty();
         boolean foundPaymentMethods =
                 mPaymentMethodsSection != null && !mPaymentMethodsSection.isEmpty();
+        boolean userCanAddCreditCard = mMerchantSupportsAutofillPaymentInstruments
+                && !ChromeFeatureList.isEnabled(ChromeFeatureList.NO_CREDIT_CARD_ABORT);
 
         if (!mArePaymentMethodsSupported
                 || (mIsShowing && !waitingForPaymentApps && !foundPaymentMethods
-                           && !mMerchantSupportsAutofillPaymentInstruments)) {
+                           && !userCanAddCreditCard)) {
             // All payment apps have responded, but none of them have instruments. It's possible to
             // add credit cards, but the merchant does not support them either. The payment request
             // must be rejected.