enable modifiers for native apps

chrome/android/javatests/src/org/chromium/chrome/browser/payments/PaymentRequestTestBase.java

Index: chrome/android/javatests/src/org/chromium/chrome/browser/payments/PaymentRequestTestBase.java
diff --git a/chrome/android/javatests/src/org/chromium/chrome/browser/payments/PaymentRequestTestBase.java b/chrome/android/javatests/src/org/chromium/chrome/browser/payments/PaymentRequestTestBase.java
index 6e4d27cfe90603802ee1ee683bc31b7837ed9145..fcd412cf2ca8cf8139b9bf875804dff3f76bd029 100644
--- a/chrome/android/javatests/src/org/chromium/chrome/browser/payments/PaymentRequestTestBase.java
+++ b/chrome/android/javatests/src/org/chromium/chrome/browser/payments/PaymentRequestTestBase.java
@@ -230,6 +230,15 @@ abstract class PaymentRequestTestBase extends ChromeActivityTestCaseBase<ChromeT
         return mTestCommon.getPaymentInstrumentLabel(index);
     }
 
+    /**  Returns the label of the payment method that is currently selected. */

[gogerald1, 2017/05/17 19:11:47]

could be simplified to: "Returns the label of the selected payment instrument."

[wuandy1, 2017/05/18 20:12:29]

Done.

+    protected String getSelectedPaymentInstrumentLabel() throws ExecutionException {
+        return mTestCommon.getSelectedPaymentInstrumentLabel();
+    }
+
+    protected String getOrderSummaryTotal() throws ExecutionException {

[gogerald1, 2017/05/17 19:11:47]

add comments

[wuandy1, 2017/05/18 20:12:29]

Done.

+        return mTestCommon.getOrderSummaryTotal();
+    }
+
     /**
      *  Returns the label corresponding to the contact detail suggestion at the specified
      *  |suggestionIndex|.