make base::SharedMemoryHandle a class on POSIX.

media/gpu/ipc/client/gpu_jpeg_decode_accelerator_host.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 "media/gpu/ipc/client/gpu_jpeg_decode_accelerator_host.h"
 
 #include <stddef.h>
 
 #include "base/bind.h"
 #include "base/logging.h"
@@ skipping 160 matching lines @@
   if (!base::SharedMemory::IsHandleValid(input_handle)) {
     DLOG(ERROR) << "Failed to duplicate handle of BitstreamBuffer";
     return;
   }
   decode_params.input_buffer.set_handle(input_handle);
   base::SharedMemoryHandle output_handle =
       channel_->ShareToGpuProcess(video_frame->shared_memory_handle());
   if (!base::SharedMemory::IsHandleValid(output_handle)) {
     DLOG(ERROR) << "Failed to duplicate handle of VideoFrame";
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
-    if (input_handle.auto_close) {
-      // Defer closing task to the ScopedFD.
-      base::ScopedFD(input_handle.fd);
+    if (input_handle.OwnershipPassesToIPC()) {
+      input_handle.Close();
     }
 #else
 // TODO(kcwu) fix the handle leak after crbug.com/493414 resolved.
 #endif
     return;
   }
 
   size_t output_buffer_size = VideoFrame::AllocationSize(
       video_frame->format(), video_frame->coded_size());
 
@@ skipping 14 matching lines @@
   if (!channel_->Send(message)) {
     DLOG(ERROR) << "Send(" << message->type() << ") failed";
   }
 }
 
 base::WeakPtr<IPC::Listener> GpuJpegDecodeAcceleratorHost::GetReceiver() {
   return receiver_->AsWeakPtrForIO();
 }
 
 }  // namespace media