PaymentApp: Initial implementation for PaymentAppManager.setManifest().

content/browser/payments/payment_app_context.cc

+// 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.
+
+#include "content/browser/payments/payment_app_context.h"
+
+#include "base/bind.h"
+#include "base/memory/ptr_util.h"
+#include "base/stl_util.h"
+#include "content/browser/payments/payment_app_manager.h"
+#include "content/browser/service_worker/service_worker_context_wrapper.h"
+#include "content/public/browser/browser_thread.h"
+
+namespace content {
+
+PaymentAppContext::PaymentAppContext() {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+}
+
+PaymentAppContext::~PaymentAppContext() {
+  DCHECK(services_.empty());
+}
+
+void PaymentAppContext::Init(
+    const scoped_refptr<ServiceWorkerContextWrapper>& context) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+}
+
+void PaymentAppContext::Shutdown() {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+
+  BrowserThread::PostTask(BrowserThread::IO, FROM_HERE,
+                          base::Bind(&PaymentAppContext::ShutdownOnIO, this));
+}
+
+void PaymentAppContext::CreateService(
+    mojo::InterfaceRequest<payments::mojom::PaymentAppManager> request) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+
+  BrowserThread::PostTask(
+      BrowserThread::IO, FROM_HERE,
+      base::Bind(&PaymentAppContext::CreateServiceOnIOThread, this,
+                 base::Passed(&request)));
+}
+
+void PaymentAppContext::ServiceHadConnectionError(PaymentAppManager* service) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+  DCHECK(base::ContainsKey(services_, service));
+
+  services_.erase(service);
+}
+
+void PaymentAppContext::CreateServiceOnIOThread(
+    mojo::InterfaceRequest<payments::mojom::PaymentAppManager> request) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+  PaymentAppManager* service = new PaymentAppManager(this, std::move(request));
+  services_[service] = base::WrapUnique(service);

[jkarlin, 2016/11/08 13:48:53]

Prefer to use base::MakeUnique. Suggest:

services_[service] = base::MakeUnique<PaymentAppManager>(this,
std::move(request));

[zino, 2016/11/08 14:34:21]

Sorry, I don't understand your comment exactly.

Do we have to do as follows?

std::unique_ptr<PaymentAppManager> service =
base::MakeUnique<PaymentAppManager>(this, std::move(request));
services_[service.get()] = std::move(service);

The service is still necessary because it's a key for hash map.

[jkarlin, 2016/11/08 14:45:03]

Ah, sorry, didn't notice that service was the key to the hash. This is fine.

+}
+
+void PaymentAppContext::ShutdownOnIO() {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+
+  services_.clear();
+}
+
+}  // namespace content