Introduce the image_decoder service

services/image_decoder/image_decoder_service.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 "services/image_decoder/image_decoder_service.h"
+
+#include "base/macros.h"
+#include "mojo/public/cpp/bindings/strong_binding.h"
+#include "services/image_decoder/image_decoder_impl.h"
+#include "services/image_decoder/public/interfaces/image_decoder.mojom.h"
+#include "services/service_manager/public/cpp/interface_registry.h"
+#include "services/service_manager/public/cpp/service_context.h"
+
+namespace image_decoder {
+
+namespace {
+
+void OnConnectionLost(std::unique_ptr<service_manager::ServiceContextRef> ref) {
+  // No-op. This merely takes ownership of |ref| so it can be destroyed when
+  // this function is invoked.
+}
+
+void OnImageDecoderRequest(
+    service_manager::ServiceContextRefFactory* ref_factory,
+    mojom::ImageDecoderRequest request) {
+  mojo::MakeStrongBinding(
+      base::MakeUnique<ImageDecoderImpl>(ref_factory->CreateRef()),
+      std::move(request));
+}
+
+}  // namespace
+
+ImageDecoderService::ImageDecoderService() = default;
+
+ImageDecoderService::~ImageDecoderService() = default;
+
+// static
+std::unique_ptr<service_manager::Service> ImageDecoderService::Create() {
+  return base::MakeUnique<ImageDecoderService>();
+}
+
+void ImageDecoderService::OnStart(service_manager::ServiceContext* context) {
+  ref_factory_.reset(new service_manager::ServiceContextRefFactory(
+      base::Bind(&service_manager::ServiceContext::RequestQuit,
+                 base::Unretained(context))));
+}
+
+bool ImageDecoderService::OnConnect(
+    const service_manager::ServiceInfo& remote_info,
+    service_manager::InterfaceRegistry* registry) {
+  // Add a reference to the service and tie it to the lifetime of the
+  // InterfaceRegistry's connection.
+  std::unique_ptr<service_manager::ServiceContextRef> connection_ref =
+      ref_factory_->CreateRef();
+  registry->AddConnectionLostClosure(
+      base::Bind(&OnConnectionLost, base::Passed(&connection_ref)));
+  registry->AddInterface(
+      base::Bind(&OnImageDecoderRequest, ref_factory_.get()));
+  return true;
+}
+
+bool ImageDecoderService::OnStop() {
+  return true;
+}
+
+}  // namespace image_decoder