[Experimental] Supporting OOPIF printing

services/pdf_compositor/pdf_compositor_service.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 SERVICES_PDF_COMPOSITOR_PDF_COMPOSITOR_SERVICE_H_
+#define SERVICES_PDF_COMPOSITOR_PDF_COMPOSITOR_SERVICE_H_
+
+#include <memory>
+
+#include "base/callback.h"
+#include "base/macros.h"
+#include "base/memory/discardable_memory_allocator.h"
+#include "base/memory/discardable_shared_memory.h"
+#include "base/memory/weak_ptr.h"
+#include "base/threading/thread.h"
+#include "components/discardable_memory/client/client_discardable_shared_memory_manager.h"
+#include "services/pdf_compositor/public/interfaces/pdf_compositor.mojom.h"
+#include "services/service_manager/public/cpp/interface_factory.h"
+#include "services/service_manager/public/cpp/service.h"
+#include "services/service_manager/public/cpp/service_context_ref.h"
+
+namespace pdf_compositor {
+
+class PdfCompositorService
+    : public service_manager::Service,
+      public service_manager::InterfaceFactory<mojom::PdfCompositor> {
+ public:
+  PdfCompositorService();
+  ~PdfCompositorService() override;
+
+  // Factory function for use as an embedded service.
+  static std::unique_ptr<service_manager::Service> Create();
+
+  // service_manager::Service:
+  void OnStart() override;
+  bool OnConnect(const service_manager::ServiceInfo& remote_info,
+                 service_manager::InterfaceRegistry* registry) override;
+  bool OnStop() override;
+
+  // service_manager::InterfaceFactory<mojom::PdfCompositor>:
+  void Create(const service_manager::Identity& remote_identity,
+              mojom::PdfCompositorRequest request) override;
+
+ private:
+  void MaybeRequestQuitDelayed();
+  void MaybeRequestQuit();
+
+  std::unique_ptr<discardable_memory::ClientDiscardableSharedMemoryManager>
+      discardable_shared_memory_manager_;
+  std::unique_ptr<base::Thread> io_thread_;
+
+  std::unique_ptr<service_manager::ServiceContextRefFactory> ref_factory_;
+  base::WeakPtrFactory<PdfCompositorService> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(PdfCompositorService);
+};
+
+}  // namespace pdf_compositor
+
+#endif  // SERVICES_PDF_COMPOSITOR_PDF_COMPOSITOR_SERVICE_H_