Re-land: 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