[Payments] Preview available payment options when no option is selected

chrome/android/java/src/org/chromium/chrome/browser/payments/ui/PaymentOption.java

Index: chrome/android/java/src/org/chromium/chrome/browser/payments/ui/PaymentOption.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/payments/ui/PaymentOption.java b/chrome/android/java/src/org/chromium/chrome/browser/payments/ui/PaymentOption.java
index 72ea33362e8d3d7a2d650f8aaa187d3a55b97f0b..72b1a569b08fc4cf2948f6e7b90eb7563483430c 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/payments/ui/PaymentOption.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/payments/ui/PaymentOption.java
@@ -15,6 +15,7 @@ import javax.annotation.Nullable;
 public class PaymentOption implements Completable {
     protected boolean mIsComplete;
     protected boolean mIsEditable;
+    protected boolean mIsPaymentCard;
     protected String mEditMessage;
     protected String mEditTitle;
     private String mId;
@@ -179,4 +180,9 @@ public class PaymentOption implements Completable {
     public boolean isEditable() {
         return mIsEditable;
     }
+
+    /** @return True if this option is a payment card. */
+    public boolean isPaymentCard() {
+        return mIsPaymentCard;
+    }
 }