Make PaymentOption store a Drawable instead of id

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.os.Handler;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.CheckBox;
@@ skipping 699 matching lines @@
         public String getIdentifier() {
             return mMethodName;
         }
     }
 
     /** A payment instrument implementation for test. */
     private static class TestPayInstrument extends PaymentInstrument {
         private final String mMethodName;
 
         TestPayInstrument(String methodName) {
-            super(methodName, "Test Pay", null, NO_ICON);
+            super(methodName, "Test Pay", null, null);
             mMethodName = methodName;
         }
 
         @Override
         public String getMethodName() {
             return mMethodName;
         }
 
         @Override
         public void getDetails(String merchantName, String origin, PaymentItem total,
                 List<PaymentItem> cart, JSONObject details, DetailsCallback detailsCallback) {
             detailsCallback.onInstrumentDetailsReady(
                     mMethodName, "{\"transaction\": 1337}");
         }
 
         @Override
         public void dismiss() {}
     }
 }