Implement H264 codec in Objective-C classes.

webrtc/sdk/objc/Framework/Classes/Video/RTCVideoCodec.mm

Index: webrtc/sdk/objc/Framework/Classes/Video/RTCVideoCodec.mm
diff --git a/webrtc/sdk/objc/Framework/Classes/PeerConnection/RTCVideoCodec.mm b/webrtc/sdk/objc/Framework/Classes/Video/RTCVideoCodec.mm
similarity index 96%
rename from webrtc/sdk/objc/Framework/Classes/PeerConnection/RTCVideoCodec.mm
rename to webrtc/sdk/objc/Framework/Classes/Video/RTCVideoCodec.mm
index a1b9109fd34d3c0313c85d2e4805c88367a942ab..ecddee365f1241fa7117e54187a9e63e526708c9 100644
--- a/webrtc/sdk/objc/Framework/Classes/PeerConnection/RTCVideoCodec.mm
+++ b/webrtc/sdk/objc/Framework/Classes/Video/RTCVideoCodec.mm
@@ -67,6 +67,7 @@
 @synthesize targetBitrate = _targetBitrate;
 @synthesize maxFramerate = _maxFramerate;
 @synthesize qpMax = _qpMax;
+@synthesize mode = _mode;
 
 - (instancetype)initWithVideoCodec:(const webrtc::VideoCodec *__nullable)videoCodec {
   if (self = [super init]) {
@@ -84,6 +85,7 @@
       _targetBitrate = videoCodec->targetBitrate;
       _maxFramerate = videoCodec->maxFramerate;
       _qpMax = videoCodec->qpMax;
+      _mode = (RTCVideoCodecMode)videoCodec->mode;
     }
   }
 
@@ -107,6 +109,7 @@
   codecSettings->targetBitrate = _targetBitrate;
   codecSettings->maxFramerate = _maxFramerate;
   codecSettings->qpMax = _qpMax;
+  codecSettings->mode = (webrtc::VideoCodecMode)_mode;
 
   return codecSettings;
 }