Deprecate CAST1 payload.

BUG=430323
TEST=trybot and manual testing of tab casting
R=hclam@chromium.org
TBR=dalecurtis@chromium.org

Review URL: https://codereview.chromium.org/695643003

Cr-Commit-Position: refs/heads/master@{#302747}

content/renderer/media/rtc_video_encoder.cc

@@ -46,8 +46,6 @@ media::VideoCodecProfile WebRTCVideoCodecToVideoCodecProfile(
           return media::H264PROFILE_MAIN;
       }
     }
-    case webrtc::kVideoCodecGeneric:
-      return media::H264PROFILE_MAIN;
     default:
       NOTREACHED() << "Unrecognized video codec type";
       return media::VIDEO_CODEC_PROFILE_UNKNOWN;
@@ -714,9 +712,7 @@ void RTCVideoEncoder::ReturnEncodedImage(scoped_ptr<webrtc::EncodedImage> image,
   memset(&header, 0, sizeof(header));
   switch (video_codec_type_) {
     case webrtc::kVideoCodecVP8:
-    case webrtc::kVideoCodecGeneric:
       // Generate a header describing a single fragment.
-      // Note that webrtc treats the generic-type payload as an opaque buffer.
       header.VerifyAndAllocateFragmentationHeader(1);
       header.fragmentationOffset[0] = 0;
       header.fragmentationLength[0] = image->_length;

content/renderer/media/rtc_video_encoder_factory.cc

@@ -38,9 +38,6 @@ void VEAToWebRTCCodecs(
       codecs->push_back(cricket::WebRtcVideoEncoderFactory::VideoCodec(
           webrtc::kVideoCodecH264, "H264", width, height, fps));
     }
-    // TODO(hshi): remove the generic codec type after CASTv1 deprecation.
-    codecs->push_back(cricket::WebRtcVideoEncoderFactory::VideoCodec(
-        webrtc::kVideoCodecGeneric, "CAST1", width, height, fps));
   }
 }