Always initialize session cache locks lazily.

net/third_party/nss/ssl/sslsock.c

Index: net/third_party/nss/ssl/sslsock.c
===================================================================
--- net/third_party/nss/ssl/sslsock.c	(revision 142005)
+++ net/third_party/nss/ssl/sslsock.c	(working copy)
@@ -289,7 +289,7 @@
     return ss;
 }
 
-sslSocket *
+static sslSocket *
 ssl_DupSocket(sslSocket *os)
 {
     sslSocket *ss;
@@ -1397,6 +1397,18 @@
 	return NULL;
     }
 
+    /*
+     * The session cache locks (cacheLock in sslnonce.c and symWrapKeysLock
+     * in ssl3con.c) are always used when there is an sslSocket 'ss',
+     * except for SSL_ClearSessionCache and SSL3_ShutdownServerCache.  So
+     * we can lazily initialize the session cache locks right before we
+     * create an sslSocket.
+     */
+    status = ssl_InitSessionCacheLocks();
+    if (status != SECSuccess) {
+	return NULL;
+    }
+
     if (model == NULL) {
 	/* Just create a default socket if we're given NULL for the model */
 	ns = ssl_NewSocket((PRBool)(!ssl_defaults.noLocks), variant);