Fix packetization logic to leave space for extensions in the last packet

webrtc/modules/rtp_rtcp/source/rtp_format_vp8_test_helper.cc

 /*
  *  Copyright (c) 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 50 matching lines @@
   return true;
 }
 
 void RtpFormatVp8TestHelper::GetAllPacketsAndCheck(
     RtpPacketizerVp8* packetizer,
     const size_t* expected_sizes,
     const int* expected_part,
     const bool* expected_frag_start,
     size_t expected_num_packets) {
   ASSERT_TRUE(inited_);
-  bool last = false;
   for (size_t i = 0; i < expected_num_packets; ++i) {
     std::ostringstream ss;
     ss << "Checking packet " << i;
     SCOPED_TRACE(ss.str());
-    EXPECT_TRUE(packetizer->NextPacket(&packet_, &last));
-    CheckPacket(expected_sizes[i], last, expected_frag_start[i]);
+    EXPECT_TRUE(packetizer->NextPacket(&packet_));
+    CheckPacket(expected_sizes[i], i + 1 == expected_num_packets,
+                expected_frag_start[i]);
   }
-  EXPECT_TRUE(last);
 }
 
 // Payload descriptor
 //       0 1 2 3 4 5 6 7
 //      +-+-+-+-+-+-+-+-+
 //      |X|R|N|S|PartID | (REQUIRED)
 //      +-+-+-+-+-+-+-+-+
 // X:   |I|L|T|K|  RSV  | (OPTIONAL)
 //      +-+-+-+-+-+-+-+-+
 // I:   |   PictureID   | (OPTIONAL)
@@ skipping 151 matching lines @@
                                          bool frag_start) {
   EXPECT_EQ(expect_bytes, packet_.payload_size());
   CheckHeader(frag_start);
   CheckPayload();
   CheckLast(last);
 }
 
 }  // namespace test
 
 }  // namespace webrtc