Update to NSS 3.15.5 and NSPR 4.10.3.

nspr/pr/include/prio.h

 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 /*
  * File:     prio.h
  *
  * Description:    PR i/o related stuff, such as file system access, file
  *         i/o, socket i/o, etc.
@@ skipping 1837 matching lines @@
     PRFileMap *fmap,
     PROffset64 offset,  /* must be aligned and sized according to the
                          * return value of PR_GetMemMapAlignment() */
     PRUint32 len);
 
 NSPR_API(PRStatus) PR_MemUnmap(void *addr, PRUint32 len);
 
 NSPR_API(PRStatus) PR_CloseFileMap(PRFileMap *fmap);
 
 /*
+ * Synchronously flush the given memory-mapped address range of the given open
+ * file to disk. The function does not return until all modified data have
+ * been written to disk.
+ *
+ * On some platforms, the function will call PR_Sync(fd) internally if it is
+ * necessary for flushing modified data to disk synchronously.
+ */
+NSPR_API(PRStatus) PR_SyncMemMap(
+    PRFileDesc *fd,
+    void *addr,
+    PRUint32 len);
+
+/*
  ******************************************************************
  *
  * Interprocess communication
  *
  ******************************************************************
  */
 
 /*
  * Creates an anonymous pipe and returns file descriptors for the
  * read and write ends of the pipe.
@@ skipping 128 matching lines @@
 
 NSPR_API(PRStatus) PR_DestroyPollableEvent(PRFileDesc *event);
 
 NSPR_API(PRStatus) PR_SetPollableEvent(PRFileDesc *event);
 
 NSPR_API(PRStatus) PR_WaitForPollableEvent(PRFileDesc *event);
 
 PR_END_EXTERN_C
 
 #endif /* prio_h___ */