Wire up transport sequence number / send time callbacks to webrtc via libjingle.

webrtc/base/byteorder_unittest.cc

 /*
  *  Copyright 2012 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.
  */
 
@@ skipping 55 matching lines @@
   buf[2] = 0x45u;
   buf[3] = 0x67u;
   buf[4] = 0x89u;
   buf[5] = 0xabu;
   buf[6] = 0xcdu;
   buf[7] = 0xefu;
   EXPECT_EQ(0x01u, Get8(buf, 0));
   EXPECT_EQ(0x23u, Get8(buf, 1));
   EXPECT_EQ(0x0123u, GetBE16(buf));
   EXPECT_EQ(0x2301u, GetLE16(buf));
+  EXPECT_EQ(0x012u, GetBE24(buf));
   EXPECT_EQ(0x01234567u, GetBE32(buf));
   EXPECT_EQ(0x67452301u, GetLE32(buf));
   EXPECT_EQ(UINT64_C(0x0123456789abcdef), GetBE64(buf));
   EXPECT_EQ(UINT64_C(0xefcdab8967452301), GetLE64(buf));
 }
 
 }  // namespace rtc