Make payment manifest download/parse cross-platform

components/payments/content/android/payment_manifest_parser_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_PAYMENT_MANIFEST_PARSER_ANDROID_H_
 #define COMPONENTS_PAYMENTS_CONTENT_ANDROID_PAYMENT_MANIFEST_PARSER_ANDROID_H_
 
 #include <jni.h>
 
 #include <memory>
 #include <vector>
 
 #include "base/android/jni_android.h"
 #include "base/android/scoped_java_ref.h"
 #include "base/macros.h"
-#include "components/payments/content/android/payment_manifest_parser.mojom.h"
-
-namespace content {
-template <class MojoInterface>
-class UtilityProcessMojoClient;
-}
+#include "components/payments/content/payment_manifest_parser_host.h"
 
 namespace payments {
 
-// Host of the utility process that parses manifest contents.
+// Android wrapper for the host of the utility process that parses manifest
+// contents.
 class PaymentManifestParserAndroid {
  public:
   PaymentManifestParserAndroid();
   ~PaymentManifestParserAndroid();
 
   void StartUtilityProcess(JNIEnv* env,
                            const base::android::JavaParamRef<jobject>& jcaller);
 
   void ParsePaymentManifest(
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& jcaller,
       const base::android::JavaParamRef<jstring>& jcontent,
       const base::android::JavaParamRef<jobject>& jcallback);
 
   // Deletes this object.
   void StopUtilityProcess(JNIEnv* env,
                           const base::android::JavaParamRef<jobject>& jcaller);
 
  private:
-  class ParseCallback;
-
-  // The |callback_identifier| parameter is a pointer to one of the owned
-  // elements in the |pending_callbacks_| list.
-  void OnParse(ParseCallback* callback_identifier,
-               std::vector<mojom::PaymentManifestSectionPtr> manifest);
-
-  void OnUtilityProcessStopped();
-
-  std::unique_ptr<
-      content::UtilityProcessMojoClient<mojom::PaymentManifestParser>>
-      mojo_client_;
-  std::vector<std::unique_ptr<ParseCallback>> pending_callbacks_;
+  PaymentManifestParserHost host_;
 
   DISALLOW_COPY_AND_ASSIGN(PaymentManifestParserAndroid);
 };
 
 bool RegisterPaymentManifestParser(JNIEnv* env);
 
 }  // namespace payments
 
 #endif  // COMPONENTS_PAYMENTS_CONTENT_ANDROID_PAYMENT_MANIFEST_PARSER_ANDROID_H_