[Payments] Move journey logger to native.

components/payments/content/android/currency_formatter_android.h

 // 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.
 
 #ifndef COMPONENTS_PAYMENTS_CONTENT_ANDROID_CURRENCY_FORMATTER_ANDROID_H_
 #define COMPONENTS_PAYMENTS_CONTENT_ANDROID_CURRENCY_FORMATTER_ANDROID_H_
 
 #include <jni.h>
 #include <memory>
 
 #include "base/android/scoped_java_ref.h"
 #include "base/macros.h"
 
 namespace payments {
 
 class CurrencyFormatter;
 
 // Forwarding calls to payments::CurrencyFormatter.
 class CurrencyFormatterAndroid {
  public:
+  // Registers the JNI bindings for this class.
+  static bool Register(JNIEnv* env);
+
   CurrencyFormatterAndroid(
       JNIEnv* env,
-      jobject unused_obj,
+      jobject jcaller,
       const base::android::JavaParamRef<jstring>& currency_code,
       const base::android::JavaParamRef<jstring>& currency_system,
       const base::android::JavaParamRef<jstring>& locale_name);
   ~CurrencyFormatterAndroid();
 
   // Message from Java to destroy this object.
-  void Destroy(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
+  void Destroy(JNIEnv* env,
+               const base::android::JavaParamRef<jobject>& jcaller);
 
   // Refer to CurrencyFormatter::Format documentation.
   base::android::ScopedJavaLocalRef<jstring> Format(
       JNIEnv* env,
-      const base::android::JavaParamRef<jobject>& unused_obj,
+      const base::android::JavaParamRef<jobject>& jcaller,
       const base::android::JavaParamRef<jstring>& amount);
 
   base::android::ScopedJavaLocalRef<jstring> GetFormattedCurrencyCode(
       JNIEnv* env,
-      const base::android::JavaParamRef<jobject>& unused_obj);
-
-  // Registers the JNI bindings for this class.
-  static bool Register(JNIEnv* env);
+      const base::android::JavaParamRef<jobject>& jcaller);
 
  private:
   std::unique_ptr<CurrencyFormatter> currency_formatter_;
 
   DISALLOW_COPY_AND_ASSIGN(CurrencyFormatterAndroid);
 };
 
 }  // namespace payments
 
 #endif  // COMPONENTS_PAYMENTS_CONTENT_ANDROID_CURRENCY_FORMATTER_ANDROID_H_