Revert of Rename RTPVideoHeader.isFirstPacket to .is_first_packet_in_frame.

webrtc/modules/video_coding/video_coding_robustness_unittest.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 48 matching lines @@
     const uint8_t payload[kPayloadLen] = {0};
     WebRtcRTPHeader rtp_info;
     memset(&rtp_info, 0, sizeof(rtp_info));
     rtp_info.frameType = frame_type;
     rtp_info.header.timestamp = timestamp;
     rtp_info.header.sequenceNumber = seq_no;
     rtp_info.header.markerBit = marker_bit;
     rtp_info.header.payloadType = video_codec_.plType;
     rtp_info.type.Video.codec = kRtpVideoVp8;
     rtp_info.type.Video.codecHeader.VP8.InitRTPVideoHeaderVP8();
-    rtp_info.type.Video.is_first_packet_in_frame = first;
+    rtp_info.type.Video.isFirstPacket = first;
 
     ASSERT_EQ(VCM_OK, vcm_->IncomingPacket(payload, kPayloadLen, rtp_info));
   }
 
   std::unique_ptr<VideoCodingModule> vcm_;
   VideoCodec video_codec_;
   MockVCMFrameTypeCallback frame_type_callback_;
   MockPacketRequestCallback request_callback_;
   NiceMock<MockVideoDecoder> decoder_;
   NiceMock<MockVideoDecoder> decoderCopy_;
@@ skipping 139 matching lines @@
 
   clock_->AdvanceTimeMilliseconds(23);
   InsertPacket(3000, 4, false, false, kVideoFrameDelta);
 
   InsertPacket(9000, 9, true, false, kVideoFrameDelta);
   InsertPacket(9000, 10, false, false, kVideoFrameDelta);
   InsertPacket(9000, 11, false, true, kVideoFrameDelta);
   EXPECT_EQ(VCM_OK, vcm_->Decode(33));  // Decode timestamp 9000 complete.
 }
 }  // namespace webrtc