Add member ownership_passes_to_ipc_ to SharedMemoryHandle on windows.

base/memory/shared_memory_handle.h

 // 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.
 
 #ifndef BASE_MEMORY_SHARED_MEMORY_HANDLE_H_
 #define BASE_MEMORY_SHARED_MEMORY_HANDLE_H_
 
 #include <stddef.h>
 
 #include "build/build_config.h"
@@ skipping 46 matching lines @@
   // Whether the underlying OS primitive is valid.
   bool IsValid() const;
 
   // Whether |pid_| is the same as the current process's id.
   bool BelongsToCurrentProcess() const;
 
   // Whether handle_ needs to be duplicated into the destination process when
   // an instance of this class is passed over a Chrome IPC channel.
   bool NeedsBrokering() const;
 
+  void SetOwnershipPassesToIPC(bool ownership_passes);
+  bool OwnershipPassesToIPC() const;
+
   HANDLE GetHandle() const;
   base::ProcessId GetPID() const;
 
  private:
   HANDLE handle_;
 
   // The process in which |handle_| is valid and can be used. If |handle_| is
   // invalid, this will be kNullProcessId.
   base::ProcessId pid_;
+
+  // Whether passing this object as a parameter to an IPC message passes
+  // ownership of |handle_| to the IPC stack. This is meant to mimic the
+  // behavior of the |auto_close| parameter of FileDescriptor. This member only
+  // affects attachment-brokered SharedMemoryHandles.
+  // Defaults to |false|.
+  bool ownership_passes_to_ipc_;
 };
 #else
 class BASE_EXPORT SharedMemoryHandle {
  public:
   // The values of these enums must not change, as they are used by the
   // histogram OSX.SharedMemory.Mechanism.
   enum Type {
     // The SharedMemoryHandle is backed by a POSIX fd.
     POSIX,
     // The SharedMemoryHandle is backed by the Mach primitive "memory object".
@@ skipping 106 matching lines @@
       // Defaults to |false|.
       bool ownership_passes_to_ipc_;
     };
   };
 };
 #endif
 
 }  // namespace base
 
 #endif  // BASE_MEMORY_SHARED_MEMORY_HANDLE_H_