Get rid of SharedMemory::GiveToProcess.

base/memory/shared_memory_nacl.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 "base/memory/shared_memory.h"
 
 #include <errno.h>
 #include <fcntl.h>
 #include <stddef.h>
 #include <sys/mman.h>
@@ skipping 114 matching lines @@
   }
 }
 
 SharedMemoryHandle SharedMemory::GetReadOnlyHandle() {
   // Untrusted code can't create descriptors or handles, which is needed to
   // drop permissions.
   return SharedMemoryHandle();
 }
 
 bool SharedMemory::ShareToProcessCommon(ProcessHandle process,
-                                        SharedMemoryHandle* new_handle,
-                                        bool close_self) {
+                                        SharedMemoryHandle* new_handle) {
   *new_handle = shm_.Duplicate();
-  if (close_self) {
-    Unmap();
-    Close();
-  }
   return new_handle->IsValid();
 }
 
 }  // namespace base