Rename RTCCodecStats.codec -> mimeType, parameters -> sdpFmtpLine.

As per https://github.com/w3c/webrtc-stats/pull/168.

NOTRY due to broken linux_ubsan_vptr, all other tests passed.

BUG=webrtc:7061
NOTRY=True

Review-Url: https://codereview.webrtc.org/2718383002
Cr-Original-Commit-Position: refs/heads/master@{#16907}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 13f54b2c5684119a1b31f172b3745cbec7229ebb
diff --git a/pc/rtcstatscollector_unittest.cc b/pc/rtcstatscollector_unittest.cc
index eea33e0..db26096 100644
--- a/pc/rtcstatscollector_unittest.cc
+++ b/pc/rtcstatscollector_unittest.cc
@@ -826,25 +826,25 @@
   RTCCodecStats expected_inbound_audio_codec(
       "RTCCodec_InboundAudio_1", report->timestamp_us());
   expected_inbound_audio_codec.payload_type = 1;
-  expected_inbound_audio_codec.codec = "audio/opus";
+  expected_inbound_audio_codec.mime_type = "audio/opus";
   expected_inbound_audio_codec.clock_rate = 1337;
 
   RTCCodecStats expected_outbound_audio_codec(
       "RTCCodec_OutboundAudio_2", report->timestamp_us());
   expected_outbound_audio_codec.payload_type = 2;
-  expected_outbound_audio_codec.codec = "audio/isac";
+  expected_outbound_audio_codec.mime_type = "audio/isac";
   expected_outbound_audio_codec.clock_rate = 1338;
 
   RTCCodecStats expected_inbound_video_codec(
       "RTCCodec_InboundVideo_3", report->timestamp_us());
   expected_inbound_video_codec.payload_type = 3;
-  expected_inbound_video_codec.codec = "video/H264";
+  expected_inbound_video_codec.mime_type = "video/H264";
   expected_inbound_video_codec.clock_rate = 1339;
 
   RTCCodecStats expected_outbound_video_codec(
       "RTCCodec_OutboundVideo_4", report->timestamp_us());
   expected_outbound_video_codec.payload_type = 4;
-  expected_outbound_video_codec.codec = "video/VP8";
+  expected_outbound_video_codec.mime_type = "video/VP8";
   expected_outbound_video_codec.clock_rate = 1340;
 
   ASSERT_TRUE(report->Get(expected_inbound_audio_codec.id()));