Add a size parameter to SharedMemoryHandle.

base/memory/shared_memory_handle_win.cc

 // 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.
 
 #include "base/memory/shared_memory_handle.h"
 
 #include "base/logging.h"
 #include "base/unguessable_token.h"
 
 namespace base {
 
-SharedMemoryHandle::SharedMemoryHandle()
-    : handle_(nullptr), ownership_passes_to_ipc_(false) {}
+SharedMemoryHandle::SharedMemoryHandle() {}
 
 SharedMemoryHandle::SharedMemoryHandle(HANDLE h,
+                                       size_t size,
                                        const base::UnguessableToken& guid)
-    : handle_(h), ownership_passes_to_ipc_(false), guid_(guid) {}
+    : handle_(h), guid_(guid), size_(size) {}
 
 void SharedMemoryHandle::Close() const {
   DCHECK(handle_ != nullptr);
   ::CloseHandle(handle_);
 }
 
 bool SharedMemoryHandle::IsValid() const {
   return handle_ != nullptr;
 }
 
 SharedMemoryHandle SharedMemoryHandle::Duplicate() const {
   HANDLE duped_handle;
   ProcessHandle process = GetCurrentProcess();
   BOOL success = ::DuplicateHandle(process, handle_, process, &duped_handle, 0,
                                    FALSE, DUPLICATE_SAME_ACCESS);
   if (!success)
     return SharedMemoryHandle();
 
-  base::SharedMemoryHandle handle(duped_handle, GetGUID());
+  base::SharedMemoryHandle handle(duped_handle, GetSize(), GetGUID());
   handle.SetOwnershipPassesToIPC(true);
   return handle;
 }
 
 HANDLE SharedMemoryHandle::GetHandle() const {
   return handle_;
 }
 
 void SharedMemoryHandle::SetOwnershipPassesToIPC(bool ownership_passes) {
   ownership_passes_to_ipc_ = ownership_passes;
 }
 
 bool SharedMemoryHandle::OwnershipPassesToIPC() const {
   return ownership_passes_to_ipc_;
 }
 
 }  // namespace base