enable modifiers for native apps

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

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.chrome.browser.payments;
 
 import android.view.View;
 
 import org.chromium.base.test.util.CallbackHelper;
 import org.chromium.base.test.util.RetryOnFailure;
@@ skipping 212 matching lines @@
     /** Gets the button state for the contact details section. */
     protected int getContactDetailsButtonState() throws ExecutionException {
         return mTestCommon.getContactDetailsButtonState();
     }
 
     /**  Returns the label corresponding to the payment instrument at the specified |index|. */
     protected String getPaymentInstrumentLabel(final int index) throws ExecutionException {
         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|.
      */
     protected String getContactDetailsSuggestionLabel(final int suggestionIndex)
             throws ExecutionException {
         return mTestCommon.getContactDetailsSuggestionLabel(suggestionIndex);
     }
 
     /**  Returns the number of payment instruments. */
@@ skipping 275 matching lines @@
     @Override
     public void startMainActivityWithURL(String url) throws InterruptedException {
         super.startMainActivityWithURL(url);
     }
 
     @Override
     public void assertWaitForPageScaleFactorMatch(float expectedScale) {
         super.assertWaitForPageScaleFactorMatch(expectedScale);
     }
 }