Stop attempting to write to transport sockets in NSS on failure.

net/socket/ssl_client_socket_nss.cc

Index: net/socket/ssl_client_socket_nss.cc
diff --git a/net/socket/ssl_client_socket_nss.cc b/net/socket/ssl_client_socket_nss.cc
index 3a8b39e678c2785ea4d6fd7c60fea762fb599883..9f40a78371e2277821ba96c173ee2e3aa316aaf8 100644
--- a/net/socket/ssl_client_socket_nss.cc
+++ b/net/socket/ssl_client_socket_nss.cc
@@ -2143,7 +2143,12 @@ int SSLClientSocketNSS::Core::BufferSend() {
   const char* buf1;
   const char* buf2;
   unsigned int len1, len2;
-  memio_GetWriteParams(nss_bufs_, &buf1, &len1, &buf2, &len2);
+  if (memio_GetWriteParams(nss_bufs_, &buf1, &len1, &buf2, &len2)) {
+    // It is important this return synchronously to prevent spinning infinitely
+    // in the off-thread NSS case. The error code itself is ignored, so just
+    // return ERR_ABORTED. See https://crbug.com/381160.
+    return ERR_ABORTED;
+  }
   const unsigned int len = len1 + len2;
 
   int rv = 0;