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

chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentRequestMetrics.java

Index: chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentRequestMetrics.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentRequestMetrics.java b/chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentRequestMetrics.java
new file mode 100644
index 0000000000000000000000000000000000000000..0d312e99502576161ec3883bf53e8e2a4f43e8f2
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+++ b/chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentRequestMetrics.java
@@ -0,0 +1,47 @@
+// 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 org.chromium.base.VisibleForTesting;
+import org.chromium.base.metrics.RecordHistogram;
+
+/**
+ * A class used to record metrics for the Payment Request feature.
+ */
+public final class PaymentRequestMetrics {
+
+    // PaymentRequestRequestedInformation defined in tools/metrics/histograms/histograms.xml.
+    @VisibleForTesting
+    public static final int REQUESTED_INFORMATION_NONE = 0;
+    @VisibleForTesting
+    public static final int REQUESTED_INFORMATION_EMAIL = 1 << 0;
+    @VisibleForTesting
+    public static final int REQUESTED_INFORMATION_PHONE = 1 << 1;
+    @VisibleForTesting
+    public static final int REQUESTED_INFORMATION_SHIPPING = 1 << 2;
+    @VisibleForTesting
+    public static final int REQUESTED_INFORMATION_MAX = 8;
+
+    // There should be no instance of PaymentRequestMetrics created.
+    private PaymentRequestMetrics() {}
+
+    /*
+     * Records the metric that keeps track of what user information are requested by merchants to
+     * complete a payment request.
+     *
+     * @param requestEmail Whether the merchant requested an email address.
+     * @param requestPhone Whether the merchant requested a phone number.
+     * @param requestShipping Whether the merchant requested a shipping address.
+     */
+    public static void recordRequestedInformationHistogram(boolean requestEmail,
+            boolean requestPhone, boolean requestShipping) {
+        int requestInformation =
+                (requestEmail ? REQUESTED_INFORMATION_EMAIL : 0)
+                | (requestPhone ? REQUESTED_INFORMATION_PHONE : 0)
+                | (requestShipping ? REQUESTED_INFORMATION_SHIPPING : 0);
+        RecordHistogram.recordEnumeratedHistogram("PaymentRequest.RequestedInformation",
+                requestInformation, REQUESTED_INFORMATION_MAX);
+    }
+}