[Payment Request] Update the CurrencyStringFormatter to call the native impl.

components/payments/android/currency_formatter_android.cc

+// Copyright 2017 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/currency_formatter_android.h"
+
+#include "base/android/jni_string.h"
+#include "base/strings/string16.h"
+#include "components/payments/currency_formatter.h"
+#include "jni/CurrencyStringFormatter_jni.h"
+
+using base::android::ConvertJavaStringToUTF8;
+
+namespace payments {
+
+CurrencyFormatterAndroid::CurrencyFormatterAndroid(
+    JNIEnv* env,
+    jobject unused_obj,
+    const JavaParamRef<jstring>& currency_code,
+    const JavaParamRef<jstring>& currency_system,
+    const JavaParamRef<jstring>& locale_name) {
+  std::string currency_system_str =
+      ConvertJavaStringToUTF8(env, currency_system);
+
+  currency_formatter_.reset(new CurrencyFormatter(
+      ConvertJavaStringToUTF8(env, currency_code),
+      currency_system_str.empty()
+          ? base::Optional<std::string>()
+          : base::Optional<std::string>(currency_system_str),
+      ConvertJavaStringToUTF8(env, locale_name)));
+}
+
+CurrencyFormatterAndroid::~CurrencyFormatterAndroid() {}
+
+base::android::ScopedJavaLocalRef<jstring>
+CurrencyFormatterAndroid::Format(
+    JNIEnv* env,
+    const JavaParamRef<jobject>& unused_obj,
+    const JavaParamRef<jstring>& amount) {
+  base::string16 result =
+      currency_formatter_->Format(ConvertJavaStringToUTF8(env, amount));
+  return base::android::ConvertUTF16ToJavaString(env, result);
+}
+
+// static
+bool CurrencyFormatterAndroid::Register(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+
+static jlong InitCurrencyFormatterAndroid(
+    JNIEnv* env,
+    const JavaParamRef<jobject>& obj,
+    const JavaParamRef<jstring>& currency_code,
+    const JavaParamRef<jstring>& currency_system,
+    const JavaParamRef<jstring>& locale_name) {
+  CurrencyFormatterAndroid* currency_formatter_android =
+      new CurrencyFormatterAndroid(env, obj, currency_code, currency_system,
+                                   locale_name);
+  return reinterpret_cast<intptr_t>(currency_formatter_android);
+}
+
+}  // namespace payments