Add CryptoParams to webrtc::MediaSession.

webrtc/api/ortc/mediadescription_unittest.cc

 /*
  *  Copyright 2017 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #include "webrtc/api/ortc/mediadescription.h"
 #include "webrtc/test/gtest.h"
 
 namespace webrtc {
 
 class MediaDescriptionTest : public testing::Test {};
 
 TEST_F(MediaDescriptionTest, CreateMediaDescription) {
   MediaDescription m("a");
   EXPECT_EQ("a", m.mid());
 }
+
+TEST_F(MediaDescriptionTest, AddSdesParam) {
+  MediaDescription m("a");
+  m.sdes_params().push_back(cricket::CryptoParams());
+  const std::vector<cricket::CryptoParams>& params = m.sdes_params();
+  EXPECT_EQ(1u, params.size());
 }
+
+}  // namespace webrtc