Add a method BrokerDuplicateSharedMemoryHandle() to the sandbox.

content/common/sandbox_init_win.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/public/common/sandbox_init.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "content/common/sandbox_win.h"
 #include "content/public/common/content_switches.h"
@@ skipping 24 matching lines @@
     return true;
   }
 
   if (command_line.HasSwitch(switches::kNoSandbox))
     return true;
 
   sandbox::TargetServices* target_services = sandbox_info->target_services;
   return InitTargetServices(target_services);
 }
 
+bool BrokerDuplicateSharedMemoryHandle(
+    const base::SharedMemoryHandle& source_handle,
+    base::ProcessId target_process_id,
+    base::SharedMemoryHandle* target_handle) {
+  return BrokerDuplicateHandle(source_handle, target_process_id, target_handle,
+                               0, DUPLICATE_SAME_ACCESS);
+}
+
 }  // namespace content