Handle-passing: Allow a handle-passing function to be supplied by Chromium

src/trusted/service_runtime/sel_main_chrome.h

 /*
  * Copyright (c) 2012 The Native Client 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 NATIVE_CLIENT_SRC_TRUSTED_SERVICE_RUNTIME_SEL_MAIN_CHROME_H_
 #define NATIVE_CLIENT_SRC_TRUSTED_SERVICE_RUNTIME_SEL_MAIN_CHROME_H_ 1
 
 #include "native_client/src/include/nacl_base.h"
@@ skipping 23 matching lines @@
 
   /* Whether to enable NaCl's built-in GDB RSP debug stub.  Boolean. */
   int enable_debug_stub;
 
   /*
    * Callback to use for creating shared memory objects.  Optional;
    * may be NULL.
    */
   NaClCreateMemoryObjectFunc create_memory_object_func;
 
+#if NACL_WINDOWS
+  /*
+   * Callback to use instead of DuplicateHandle() for copying a
+   * Windows handle to another process.  Optional; may be NULL.
+   */
+  NaClBrokerDuplicateHandleFunc broker_duplicate_handle_func;
+#endif
+
   /* Cache for NaCl validation judgements.  Optional; may be NULL. */
   struct NaClValidationCache *validation_cache;
 };
 
 /* Create a new args struct containing default values. */
 struct NaClChromeMainArgs *NaClChromeMainArgsCreate(void);
 
 /* Launch NaCl. */
 void NaClChromeMainStart(struct NaClChromeMainArgs *args);
 
 
 EXTERN_C_END
 
 #endif