Update from https://crrev.com/333737

base/memory/shared_memory_win.cc

 // Copyright (c) 2011 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 <aclapi.h>
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 82 matching lines @@
   ::CloseHandle(handle);
 }
 
 // static
 size_t SharedMemory::GetHandleLimit() {
   // Rounded down from value reported here:
   // http://blogs.technet.com/b/markrussinovich/archive/2009/09/29/3283844.aspx
   return static_cast<size_t>(1 << 23);
 }
 
+// static
+SharedMemoryHandle SharedMemory::DuplicateHandle(
+    const SharedMemoryHandle& handle) {
+  ProcessHandle process = GetCurrentProcess();
+  SharedMemoryHandle duped_handle;
+  BOOL success = ::DuplicateHandle(process, handle, process, &duped_handle, 0,
+                                   FALSE, DUPLICATE_SAME_ACCESS);
+  if (success)
+    return duped_handle;
+  return NULLHandle();
+}
+
 bool SharedMemory::CreateAndMapAnonymous(size_t size) {
   return CreateAnonymous(size) && Map(size);
 }
 
 bool SharedMemory::Create(const SharedMemoryCreateOptions& options) {
   // TODO(bsy,sehr): crbug.com/210609 NaCl forces us to round up 64k here,
   // wasting 32k per mapping on average.
   static const size_t kSectionMask = 65536 - 1;
   DCHECK(!options.executable);
   DCHECK(!mapped_file_);
@@ skipping 122 matching lines @@
     options = DUPLICATE_CLOSE_SOURCE;
     mapped_file_ = NULL;
     Unmap();
   }
 
   if (process == GetCurrentProcess() && close_self) {
     *new_handle = mapped_file;
     return true;
   }
 
-  if (!DuplicateHandle(GetCurrentProcess(), mapped_file, process,
-      &result, access, FALSE, options))
+  if (!::DuplicateHandle(GetCurrentProcess(), mapped_file, process, &result,
+                         access, FALSE, options)) {
     return false;
+  }
   *new_handle = result;
   return true;
 }
 
 
 void SharedMemory::Close() {
   if (mapped_file_ != NULL) {
     CloseHandle(mapped_file_);
     mapped_file_ = NULL;
   }
@@ skipping 17 matching lines @@
 void SharedMemory::UnlockDeprecated() {
   DCHECK(lock_ != NULL);
   ReleaseMutex(lock_);
 }
 
 SharedMemoryHandle SharedMemory::handle() const {
   return mapped_file_;
 }
 
 }  // namespace base