PaymentApp: Factor out functions to serialize/deserialize manifest data.

content/browser/payments/payment_app_context.h

-// 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.
-
-#ifndef CONTENT_BROWSER_PAYMENTS_PAYMENT_APP_CONTEXT_H_
-#define CONTENT_BROWSER_PAYMENTS_PAYMENT_APP_CONTEXT_H_
-
-#include <map>
-#include <memory>
-
-#include "base/macros.h"
-#include "base/memory/ref_counted.h"
-#include "components/payments/payment_app.mojom.h"
-#include "content/common/content_export.h"
-
-namespace content {
-
-class PaymentAppManager;
-class ServiceWorkerContextWrapper;
-
-class CONTENT_EXPORT PaymentAppContext
-    : public base::RefCountedThreadSafe<PaymentAppContext> {
- public:
-  explicit PaymentAppContext(
-      scoped_refptr<ServiceWorkerContextWrapper> service_worker_context);
-
-  // Shutdown must be called before deleting this. Call on the UI thread.
-  void Shutdown();
-
-  // Create a PaymentAppManager that is owned by this. Call on the UI
-  // thread.
-  void CreateService(
-      mojo::InterfaceRequest<payments::mojom::PaymentAppManager> request);
-
-  // Called by PaymentAppManager objects so that they can
-  // be deleted. Call on the IO thread.
-  void ServiceHadConnectionError(PaymentAppManager* service);
-
-  ServiceWorkerContextWrapper* service_worker_context() const;
-
- protected:
-  friend class base::RefCountedThreadSafe<PaymentAppContext>;
-  friend class PaymentAppManagerTest;
-  virtual ~PaymentAppContext();
-
- private:
-  void CreateServiceOnIOThread(
-      mojo::InterfaceRequest<payments::mojom::PaymentAppManager> request);
-
-  void ShutdownOnIO();
-
-  scoped_refptr<ServiceWorkerContextWrapper> service_worker_context_;
-
-  // The services are owned by this. They're either deleted
-  // during ShutdownOnIO or when the channel is closed via
-  // ServiceHadConnectionError. Only accessed on the IO thread.
-  std::map<PaymentAppManager*, std::unique_ptr<PaymentAppManager>> services_;
-
-  DISALLOW_COPY_AND_ASSIGN(PaymentAppContext);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_PAYMENTS_PAYMENT_APP_CONTEXT_H_