Replace IOSurfaceManager by directly passing IOSurface Mach ports over Chrome IPC.

content/child/child_io_surface_manager_mac.h

-// Copyright 2015 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_CHILD_CHILD_IO_SURFACE_MANAGER_MAC_H_
-#define CONTENT_CHILD_CHILD_IO_SURFACE_MANAGER_MAC_H_
-
-#include "base/mac/scoped_mach_port.h"
-#include "base/macros.h"
-#include "base/memory/singleton.h"
-#include "content/common/content_export.h"
-#include "content/common/mac/io_surface_manager_token.h"
-#include "ui/gfx/mac/io_surface_manager.h"
-
-namespace content {
-
-// Implementation of IOSurfaceManager that registers and acquires IOSurfaces
-// through a Mach service.
-class CONTENT_EXPORT ChildIOSurfaceManager : public gfx::IOSurfaceManager {
- public:
-  // Returns the global ChildIOSurfaceManager.
-  static ChildIOSurfaceManager* GetInstance();
-
-  // Overridden from IOSurfaceManager:
-  bool RegisterIOSurface(gfx::IOSurfaceId io_surface_id,
-                         int client_id,
-                         IOSurfaceRef io_surface) override;
-  void UnregisterIOSurface(gfx::IOSurfaceId io_surface_id,
-                           int client_id) override;
-  IOSurfaceRef AcquireIOSurface(gfx::IOSurfaceId io_surface_id) override;
-
-  // Set the service Mach port. Ownership of |service_port| is passed to the
-  // manager.
-  // Note: This can be called on any thread but must happen before the
-  // thread-safe IOSurfaceManager interface is used. It is the responsibility
-  // of users of this class to ensure there are no races.
-  void set_service_port(mach_port_t service_port) {
-    service_port_.reset(service_port);
-  }
-
-  // Set the token used when communicating with the Mach service.
-  // Note: This can be called on any thread but must happen before the
-  // thread-safe IOSurfaceManager interface is used. It is the responsibility
-  // of users of this class to ensure there are no races.
-  void set_token(const IOSurfaceManagerToken& token) {
-    token_ = token;
-  }
-
- private:
-  friend struct base::DefaultSingletonTraits<ChildIOSurfaceManager>;
-
-  ChildIOSurfaceManager();
-  ~ChildIOSurfaceManager() override;
-
-  base::mac::ScopedMachSendRight service_port_;
-  IOSurfaceManagerToken token_;
-
-  DISALLOW_COPY_AND_ASSIGN(ChildIOSurfaceManager);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_CHILD_CHILD_IO_SURFACE_MANAGER_MAC_H_