[Web Payments] Common Payments validation

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

Index: chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentValidator.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentValidator.java b/chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentValidator.java
new file mode 100644
index 0000000000000000000000000000000000000000..f14507df955250ee2ef3555d5139518d4457c355
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentValidator.java
@@ -0,0 +1,25 @@
+// 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.annotations.JNINamespace;
+import org.chromium.payments.mojom.PaymentDetails;
+
+import java.nio.ByteBuffer;
+
+/**
+ * Static class to represent a JNI interface to a C++ validation library.
+ */
+@JNINamespace("payments")
+public class PaymentValidator {
+    public static boolean validatePaymentDetails(PaymentDetails details) {
+        if (details == null) {

[please use gerrit instead, 2016/10/31 14:31:15]

Formatting nit: Chrome's Android code usually inlines short statements like
this.

if (details == null) return false;

[Kevin Bailey, 2016/10/31 20:32:00]

Interesting. How would you set a breakpoint on the return statement if you
needed to?

+            return false;
+        }
+        return nativeValidatePaymentDetails(details.serialize());
+    }
+
+    private static native boolean nativeValidatePaymentDetails(ByteBuffer buffer);
+};