Add a GUID to base::SharedMemoryHandle.

sandbox/win/src/process_mitigations_win32k_dispatcher.cc

 // Copyright 2014 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 "sandbox/win/src/process_mitigations_win32k_dispatcher.h"
 
 #include <algorithm>
 
 #include "base/memory/shared_memory.h"
 #include "base/strings/string16.h"
+#include "base/unguessable_token.h"
 #include "base/win/windows_version.h"
 #include "sandbox/win/src/interception.h"
 #include "sandbox/win/src/interceptors.h"
 #include "sandbox/win/src/ipc_tags.h"
 #include "sandbox/win/src/process_mitigations_win32k_interception.h"
 #include "sandbox/win/src/process_mitigations_win32k_policy.h"
 
 namespace sandbox {
 
 namespace {
 
 base::SharedMemoryHandle GetSharedMemoryHandle(const ClientInfo& client_info,
                                                HANDLE handle) {
   HANDLE result_handle = nullptr;
   intptr_t handle_int = reinterpret_cast<intptr_t>(handle);
   if (handle_int <= 0 ||
       !::DuplicateHandle(client_info.process, handle, ::GetCurrentProcess(),
                          &result_handle, 0, FALSE, DUPLICATE_SAME_ACCESS)) {
     result_handle = nullptr;
   }
-  return base::SharedMemoryHandle(result_handle);
+  return base::SharedMemoryHandle(result_handle,
+                                  base::UnguessableToken::Create());
 }
 
 }  // namespace
 
 ProtectedVideoOutput::~ProtectedVideoOutput() {
   ProcessMitigationsWin32KLockdownPolicy::DestroyOPMProtectedOutputAction(
       handle_);
 }
 
 scoped_refptr<ProtectedVideoOutput>
@@ skipping 526 matching lines @@
   if (!status) {
     memcpy(buffer.memory(), &requested_info,
            sizeof(DXGKMDT_OPM_REQUESTED_INFORMATION));
   }
   ipc->return_info.nt_status = status;
   return true;
 }
 
 }  // namespace sandbox