Show modified total price for payment instruments.

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

Index: chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentInstrument.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentInstrument.java b/chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentInstrument.java
index 34f3ed8260ada6490e483aef3e56536479f6388e..1ecb30bb6f67c54a5ac1e0a0db423bdc6b45ce9d 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentInstrument.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentInstrument.java
@@ -45,6 +45,15 @@ public abstract class PaymentInstrument extends PaymentOption {
     }
 
     /**
+     * Sets the modified total for this payment instrument.
+     *
+     * @param modifiedTotal The new modified total to use.
+     */
+    public void setModifiedTotal(String modifiedTotal) {

[Ian Wen, 2016/11/30 22:16:22]

Nit: add @Nullable to the argument.

[please use gerrit instead, 2016/12/01 20:26:50]

Done.

+        updateTertiarylabel(modifiedTotal);
+    }
+
+    /**
      * Returns a method name for this instrument, e.g., "visa" or "mastercard" in basic card
      * payments: https://w3c.github.io/webpayments-methods-card/#method-id
      *