Make SharedMemoryHandle a class on windows.

content/common/gpu/client/gpu_channel_host.cc

 // 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.
 
 #include "content/common/gpu/client/gpu_channel_host.h"
 
 #include <algorithm>
 
 #include "base/atomic_sequence_num.h"
 #include "base/bind.h"
@@ skipping 316 matching lines @@
   // Windows and Mac need to explicitly duplicate the handle out to another
   // process.
   base::SharedMemoryHandle target_handle;
   base::ProcessId peer_pid;
   {
     AutoLock lock(context_lock_);
     if (!channel_)
       return base::SharedMemory::NULLHandle();
     peer_pid = channel_->GetPeerPID();
   }
-#if defined(OS_WIN)
-  bool success =
-      BrokerDuplicateHandle(source_handle, peer_pid, &target_handle,
-                            FILE_GENERIC_READ | FILE_GENERIC_WRITE, 0);
-#elif defined(OS_MACOSX)
   bool success = BrokerDuplicateSharedMemoryHandle(source_handle, peer_pid,
                                                    &target_handle);
-#endif
   if (!success)
     return base::SharedMemory::NULLHandle();
 
   return target_handle;
 #else
   return base::SharedMemory::DuplicateHandle(source_handle);
 #endif  // defined(OS_WIN) || defined(OS_MACOSX)
 }
 
 int32 GpuChannelHost::ReserveTransferBufferId() {
@@ skipping 106 matching lines @@
 
   listeners_.clear();
 }
 
 bool GpuChannelHost::MessageFilter::IsLost() const {
   AutoLock lock(lock_);
   return lost_;
 }
 
 }  // namespace content