Revert of content: Single process support for native GpuMemoryBuffers.

content/browser/in_process_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_BROWSER_IN_PROCESS_IO_SURFACE_MANAGER_MAC_H_
-#define CONTENT_BROWSER_IN_PROCESS_IO_SURFACE_MANAGER_MAC_H_
-
-#include "base/containers/scoped_ptr_hash_map.h"
-#include "base/mac/scoped_mach_port.h"
-#include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/memory/singleton.h"
-#include "base/synchronization/lock.h"
-#include "content/common/content_export.h"
-#include "content/common/mac/io_surface_manager.h"
-
-namespace content {
-
-class CONTENT_EXPORT InProcessIOSurfaceManager : public IOSurfaceManager {
- public:
-  static InProcessIOSurfaceManager* GetInstance();
-
-  // Overridden from IOSurfaceManager:
-  bool RegisterIOSurface(int io_surface_id,
-                         int client_id,
-                         IOSurfaceRef io_surface) override;
-  void UnregisterIOSurface(int io_surface_id, int client_id) override;
-  IOSurfaceRef AcquireIOSurface(int io_surface_id) override;
-
- private:
-  friend struct DefaultSingletonTraits<InProcessIOSurfaceManager>;
-
-  InProcessIOSurfaceManager();
-  ~InProcessIOSurfaceManager() override;
-
-  using IOSurfaceMap =
-      base::ScopedPtrHashMap<int, scoped_ptr<base::mac::ScopedMachSendRight>>;
-  IOSurfaceMap io_surfaces_;
-  base::Lock lock_;
-
-  DISALLOW_COPY_AND_ASSIGN(InProcessIOSurfaceManager);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_IN_PROCESS_IO_SURFACE_MANAGER_MAC_H_