Update mojo sdk to rev 9fbbc4f0fef1187312316c0ed992342474e139f1

mojo/edk/system/unique_identifier.cc

+// Copyright 2014 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 "mojo/edk/system/unique_identifier.h"
+
+#include <ostream>
+
+#include "base/strings/string_number_conversions.h"
+#include "crypto/random.h"
+
+namespace mojo {
+namespace system {
+
+std::ostream& operator<<(std::ostream& out,
+                         const UniqueIdentifier& unique_identifier) {
+  return out << base::HexEncode(unique_identifier.data_,
+                                sizeof(unique_identifier.data_));
+}
+
+// static
+UniqueIdentifier UniqueIdentifier::Generate() {
+  UniqueIdentifier rv;
+  crypto::RandBytes(rv.data_, sizeof(rv.data_));
+  return rv;
+}
+
+}  // namespace system
+}  // namespace mojo