content: Pass IOSurface references using Mach IPC.

content/browser/renderer_host/render_process_host_impl.h

 // Copyright (c) 2012 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_RENDERER_HOST_RENDER_PROCESS_HOST_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_PROCESS_HOST_IMPL_H_
 
 #include <map>
 #include <queue>
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
 #include "base/process/process.h"
 #include "content/browser/child_process_launcher.h"
 #include "content/browser/dom_storage/session_storage_namespace_impl.h"
 #include "content/browser/power_monitor_message_broadcaster.h"
 #include "content/common/content_export.h"
 #include "content/common/mojo/service_registry_impl.h"
 #include "content/public/browser/render_process_host.h"
 #include "ipc/ipc_channel_proxy.h"
 #include "ipc/ipc_platform_file.h"
 #include "third_party/mojo/src/mojo/public/cpp/bindings/interface_ptr.h"
 #include "ui/gfx/gpu_memory_buffer.h"
 #include "ui/gl/gpu_switching_observer.h"
 
+#if defined(OS_MACOSX) && !defined(OS_IOS)
+#include "gpu/command_buffer/common/mailbox.h"
+#endif
+
 namespace base {
 class CommandLine;
 class MessageLoop;
 }
 
 namespace gfx {
 class Size;
 }
 
 namespace gpu {
@@ skipping 456 matching lines @@
   SubscriptionSet subscription_set_;
 
   // Maintains ValueStates which are not currently subscribed too so we can
   // pass them to the GpuService if a Valuebuffer ever subscribes to the
   // respective subscription target
   scoped_refptr<gpu::ValueStateMap> pending_valuebuffer_state_;
 
   // Whether or not the CHROMIUM_subscribe_uniform WebGL extension is enabled
   bool subscribe_uniform_enabled_;
 
+#if defined(OS_MACOSX) && !defined(OS_IOS)
+  gpu::Mailbox io_surface_manager_mailbox_;
+#endif
+
   base::WeakPtrFactory<RenderProcessHostImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderProcessHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_PROCESS_HOST_IMPL_H_