[Web Payments] Common Payments validation

components/payments/android/payments_jni_registrar.cc

Index: components/payments/android/payments_jni_registrar.cc
diff --git a/components/payments/android/payments_jni_registrar.cc b/components/payments/android/payments_jni_registrar.cc
new file mode 100644
index 0000000000000000000000000000000000000000..37bf6024a8103e961ca9a3f4496769f2747734f6
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+++ b/components/payments/android/payments_jni_registrar.cc
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+// 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.
+
+#include "components/payments/android/payments_jni_registrar.h"
+
+#include <string>
+#include <utility>
+
+#include "components/payments/payment_details_validation.h"
+#include "components/payments/payment_request.mojom.h"
+#include "jni/PaymentValidator_jni.h"
+
+namespace payments {
+
+jboolean ValidatePaymentDetails(
+    JNIEnv* env,
+    const base::android::JavaParamRef<jclass>& jcaller,
+    const base::android::JavaParamRef<jobject>& buffer) {
+  jbyte* buf_in = static_cast<jbyte*>(env->GetDirectBufferAddress(buffer));
+  jlong buf_size = env->GetDirectBufferCapacity(buffer);
+  mojo::Array<uint8_t> mojo_buffer = mojo::Array<uint8_t>::New(buf_size);
+  memcpy(&mojo_buffer[0], buf_in, buf_size);
+  blink::mojom::PaymentDetailsPtr details;
+  if (!blink::mojom::PaymentDetails::Deserialize(std::move(mojo_buffer),
+                                                 &details))
+    return false;
+  std::string unused_error_message;
+  return payments::validatePaymentDetails(details, &unused_error_message);
+}
+
+}  // namespace payments
+
+bool RegisterPaymentValidator(JNIEnv* env) {
+  return payments::RegisterNativesImpl(env);
+}