Revert of Cast:Adding cast_transport_config and cleaning up

media/cast/video_receiver/video_decoder.cc

Index: media/cast/video_receiver/video_decoder.cc
diff --git a/media/cast/video_receiver/video_decoder.cc b/media/cast/video_receiver/video_decoder.cc
index d7ce09f00d8e82bdfe40e3ae113f12c58968f109..aaa68111f4fd31fef5edbbc0af28c0cb9c0f5225 100644
--- a/media/cast/video_receiver/video_decoder.cc
+++ b/media/cast/video_receiver/video_decoder.cc
@@ -17,10 +17,10 @@
     : codec_(video_config.codec),
       vp8_decoder_() {
   switch (video_config.codec) {
-    case transport::kVp8:
+    case kVp8:
       vp8_decoder_.reset(new Vp8Decoder(cast_environment));
       break;
-    case transport::kH264:
+    case kH264:
       NOTIMPLEMENTED();
       break;
   }
@@ -28,11 +28,10 @@
 
 VideoDecoder::~VideoDecoder() {}
 
-bool VideoDecoder::DecodeVideoFrame(
-    const transport::EncodedVideoFrame* encoded_frame,
-    const base::TimeTicks render_time,
-    const VideoFrameDecodedCallback&
-    frame_decoded_cb) {
+bool VideoDecoder::DecodeVideoFrame(const EncodedVideoFrame* encoded_frame,
+                                    const base::TimeTicks render_time,
+                                    const VideoFrameDecodedCallback&
+                                    frame_decoded_cb) {
   DCHECK(encoded_frame->codec == codec_) << "Invalid codec";
   DCHECK_GT(encoded_frame->data.size(), GG_UINT64_C(0)) << "Empty video frame";
   return vp8_decoder_->Decode(encoded_frame, render_time, frame_decoded_cb);