Add member ownership_passes_to_ipc_ to SharedMemoryHandle on windows.

base/memory/shared_memory_handle.h

Index: base/memory/shared_memory_handle.h
diff --git a/base/memory/shared_memory_handle.h b/base/memory/shared_memory_handle.h
index f90553e2fe733ddc9a5b9a4c483a3b3af4fc1b20..5befcdd6b59f42c50a4ca905c0da28291706b4ca 100644
--- a/base/memory/shared_memory_handle.h
+++ b/base/memory/shared_memory_handle.h
@@ -64,6 +64,9 @@ class BASE_EXPORT SharedMemoryHandle {
   // 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;
 
@@ -73,6 +76,13 @@ class BASE_EXPORT SharedMemoryHandle {
   // 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 {