Revert of content: Single process support for native GpuMemoryBuffers.

content/browser/in_process_io_surface_manager_mac.cc

-// 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.
-
-#include "content/browser/in_process_io_surface_manager_mac.h"
-
-#include "base/logging.h"
-
-namespace content {
-
-// static
-InProcessIOSurfaceManager* InProcessIOSurfaceManager::GetInstance() {
-  return Singleton<InProcessIOSurfaceManager,
-                   LeakySingletonTraits<InProcessIOSurfaceManager>>::get();
-}
-
-bool InProcessIOSurfaceManager::RegisterIOSurface(int io_surface_id,
-                                                  int client_id,
-                                                  IOSurfaceRef io_surface) {
-  base::AutoLock lock(lock_);
-
-  DCHECK(io_surfaces_.find(io_surface_id) == io_surfaces_.end());
-  io_surfaces_.add(io_surface_id,
-                   make_scoped_ptr(new base::mac::ScopedMachSendRight(
-                       IOSurfaceCreateMachPort(io_surface))));
-  return true;
-}
-
-void InProcessIOSurfaceManager::UnregisterIOSurface(int io_surface_id,
-                                                    int client_id) {
-  base::AutoLock lock(lock_);
-
-  DCHECK(io_surfaces_.find(io_surface_id) != io_surfaces_.end());
-  io_surfaces_.erase(io_surface_id);
-}
-
-IOSurfaceRef InProcessIOSurfaceManager::AcquireIOSurface(int io_surface_id) {
-  base::AutoLock lock(lock_);
-
-  DCHECK(io_surfaces_.find(io_surface_id) != io_surfaces_.end());
-  return IOSurfaceLookupFromMachPort(io_surfaces_.get(io_surface_id)->get());
-}
-
-InProcessIOSurfaceManager::InProcessIOSurfaceManager() {
-}
-
-InProcessIOSurfaceManager::~InProcessIOSurfaceManager() {
-}
-
-}  // namespace content