[Payments] Format and validate phone number by using libphonenumber

chrome/browser/autofill/android/phone_number_util_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 "chrome/browser/autofill/android/phone_number_util_android.h"
+
+#include "base/android/jni_string.h"
+#include "base/logging.h"
+#include "chrome/browser/browser_process.h"
+#include "components/autofill/core/browser/autofill_country.h"
+#include "jni/PhoneNumberUtil_jni.h"
+
+using base::android::ConvertJavaStringToUTF8;
+using base::android::ConvertUTF8ToJavaString;
+using ::i18n::phonenumbers::PhoneNumber;
+
+namespace autofill {
+
+// static
+bool PhoneNumberUtilAndroid::Register(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+
+PhoneNumberUtilAndroid::PhoneNumberUtilAndroid(JNIEnv* env, jobject obj)
+    : weak_java_obj_(env, obj),
+      phone_number_util_(PhoneNumberUtil::GetInstance()) {}

[Mathieu, 2017/03/10 20:42:51]

It looks like this is cheap? Perhaps we can make Format be a "static" method and
not wrap it in PhoneNumberUtilAndroid?

This is an example:
https://cs.chromium.org/chromium/src/components/payments/content/android/paym...

[gogerald1, 2017/03/10 23:17:36]

Done.

+
+ScopedJavaLocalRef<jstring> PhoneNumberUtilAndroid::Format(
+    JNIEnv* env,
+    const JavaParamRef<jobject>& unused_obj,
+    const JavaParamRef<jstring>& jphone_number) {
+  const std::string phone_number = ConvertJavaStringToUTF8(env, jphone_number);
+
+  PhoneNumber parsed_number;
+  std::string default_region_code =
+      autofill::AutofillCountry::CountryCodeForLocale(
+          g_browser_process->GetApplicationLocale());
+  if (phone_number_util_->Parse(phone_number, default_region_code,
+                                &parsed_number) !=
+      PhoneNumberUtil::NO_PARSING_ERROR) {
+    return ConvertUTF8ToJavaString(env, phone_number);
+  }
+
+  std::string formtted_number;
+  phone_number_util_->Format(parsed_number,
+                             PhoneNumberUtil::PhoneNumberFormat::INTERNATIONAL,
+                             &formtted_number);
+
+  return ConvertUTF8ToJavaString(env, formtted_number);
+}
+
+jboolean PhoneNumberUtilAndroid::IsValidNumber(
+    JNIEnv* env,
+    const JavaParamRef<jobject>& unused_obj,
+    const JavaParamRef<jstring>& jphone_number) {
+  const std::string phone_number = ConvertJavaStringToUTF8(env, jphone_number);
+
+  PhoneNumber parsed_number;
+  if (phone_number_util_->Parse(phone_number,
+                                autofill::AutofillCountry::CountryCodeForLocale(
+                                    g_browser_process->GetApplicationLocale()),
+                                &parsed_number) !=
+      PhoneNumberUtil::NO_PARSING_ERROR) {
+    return false;
+  }
+
+  return phone_number_util_->IsValidNumber(parsed_number);
+}
+
+static jlong Init(JNIEnv* env, const JavaParamRef<jobject>& obj) {
+  PhoneNumberUtilAndroid* phone_number_util_android =
+      new PhoneNumberUtilAndroid(env, obj);
+  return reinterpret_cast<intptr_t>(phone_number_util_android);
+}
+
+}  // namespace autofill