PaymentRequest.abort() should return a promise.

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 f81c712eca678bd54550e1f80fa510243495469b..199cd6bf2b61006891dd62e76ddddb6e1801cbac 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
@@ -83,11 +83,20 @@ abstract class PaymentRequestTestBase extends ChromeActivityTestCaseBase<ChromeA
             }
         });
         assertWaitForPageScaleFactorMatch(1);
+        clickNodeAndWait("buy", helper);
+        mUI = helper.getTarget();
+    }
 
+    protected void clickNodeAndWait(String nodeId, CallbackHelper helper)
+            throws InterruptedException, ExecutionException, TimeoutException {
         int callCount = helper.getCallCount();
-        DOMUtils.clickNode(this, mViewCoreRef.get(), "buy");
+        clickNode(nodeId);
         helper.waitForCallback(callCount);
-        mUI = helper.getTarget();
+    }
+
+    protected void clickNode(String nodeId) throws InterruptedException, ExecutionException,
+              TimeoutException {

[gone, 2016/06/09 15:49:28]

nit: indentation is wonky

[please use gerrit instead, 2016/06/09 22:36:14]

Done.

+        DOMUtils.clickNode(this, mViewCoreRef.get(), nodeId);
     }
 
     protected void clickAndWait(final int resourceId, CallbackHelper helper)