[Payments] Add information requested by merchant metrics to PR.

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

Index: chrome/android/javatests/src/org/chromium/chrome/browser/payments/PaymentRequestEmailTest.java
diff --git a/chrome/android/javatests/src/org/chromium/chrome/browser/payments/PaymentRequestEmailTest.java b/chrome/android/javatests/src/org/chromium/chrome/browser/payments/PaymentRequestEmailTest.java
index 8c1ffb75a96954b6c2dc87908b949f7fb73f5d53..4ef037c1b9d3ed3d359c67737e204b1a8aa2dc0a 100644
--- a/chrome/android/javatests/src/org/chromium/chrome/browser/payments/PaymentRequestEmailTest.java
+++ b/chrome/android/javatests/src/org/chromium/chrome/browser/payments/PaymentRequestEmailTest.java
@@ -7,6 +7,7 @@ package org.chromium.chrome.browser.payments;
 import android.content.DialogInterface;
 import android.test.suitebuilder.annotation.MediumTest;
 
+import org.chromium.base.metrics.RecordHistogram;
 import org.chromium.chrome.R;
 import org.chromium.chrome.browser.autofill.AutofillTestHelper;
 import org.chromium.chrome.browser.autofill.PersonalDataManager.AutofillProfile;
@@ -75,4 +76,22 @@ public class PaymentRequestEmailTest extends PaymentRequestTestBase {
         clickCardUnmaskButtonAndWait(DialogInterface.BUTTON_POSITIVE, mDismissed);
         expectResultContains(new String[] {"jane.jones@google.com"});
     }
+
+    /**
+     * Test that starting a payment request that requires only the user's email address results in
+     * the appropriate metric being logged in the PaymentRequest.RequestedInformation histogram.
+     */
+    @MediumTest
+    public void testRequestedInformationMetric() throws InterruptedException, ExecutionException,
+            TimeoutException {
+        // Start the Payment Request.
+        triggerUIAndWait(mReadyToPay);
+
+        // Make sure that only the appropriate enum value was logged.
+        for (int i = 0; i < PaymentRequestMetrics.REQUESTED_INFORMATION_MAX; ++i) {
+            assertEquals((i == PaymentRequestMetrics.REQUESTED_INFORMATION_EMAIL ? 1 : 0),
+                    RecordHistogram.getHistogramValueCountForTesting(
+                            "PaymentRequest.RequestedInformation", i));
+        }
+    }
 }