[NaCl SDK] Consistent use of copyright header.

native_client_sdk/src/libraries/nacl_io/kernel_object.cc

-/* Copyright (c) 2012 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.
- */
+// Copyright (c) 2012 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 "nacl_io/kernel_object.h"
 
 #include <assert.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <pthread.h>
 
 #include <algorithm>
 #include <map>
 #include <string>
@@ skipping 175 matching lines @@
 
 void KernelObject::FreeFD(int fd) {
   AUTO_LOCK(handle_lock_);
 
   handle_map_[fd].reset(NULL);
   free_fds_.push_back(fd);
 
   // Force lower numbered FD to be available first.
   std::push_heap(free_fds_.begin(), free_fds_.end(), std::greater<int>());
 }