Revert of Rename RTPVideoHeader.isFirstPacket to .is_first_packet_in_frame.

webrtc/modules/video_coding/test/stream_generator.cc

 /*
  *  Copyright (c) 2013 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 44 matching lines @@
                                           uint32_t timestamp,
                                           unsigned int size,
                                           bool first_packet,
                                           bool marker_bit,
                                           FrameType type) {
   EXPECT_LT(size, kMaxPacketSize);
   VCMPacket packet;
   packet.seqNum = sequence_number;
   packet.timestamp = timestamp;
   packet.frameType = type;
-  packet.is_first_packet_in_frame = first_packet;
+  packet.isFirstPacket = first_packet;
   packet.markerBit = marker_bit;
   packet.sizeBytes = size;
   packet.dataPtr = packet_buffer_;
-  if (packet.is_first_packet_in_frame)
+  if (packet.isFirstPacket)
     packet.completeNALU = kNaluStart;
   else if (packet.markerBit)
     packet.completeNALU = kNaluEnd;
   else
     packet.completeNALU = kNaluIncomplete;
   return packet;
 }
 
 bool StreamGenerator::PopPacket(VCMPacket* packet, int index) {
   std::list<VCMPacket>::iterator it = GetPacketIterator(index);
@@ skipping 41 matching lines @@
   std::list<VCMPacket>::iterator it = packets_.begin();
   for (int i = 0; i < index; ++i) {
     ++it;
     if (it == packets_.end())
       break;
   }
   return it;
 }
 
 }  // namespace webrtc