Move VideoDecoder::Create() logic to separate internal video decoder factory

webrtc/test/encoder_settings.cc

Index: webrtc/test/encoder_settings.cc
diff --git a/webrtc/test/encoder_settings.cc b/webrtc/test/encoder_settings.cc
index 80c42ef04a5f4028cb72b09790cb8494384a39b7..061fafcb07858cc5251ac2d8ad76bf8ee64e107f 100644
--- a/webrtc/test/encoder_settings.cc
+++ b/webrtc/test/encoder_settings.cc
@@ -12,8 +12,10 @@
 #include <algorithm>
 #include <string>
 
+#include "webrtc/modules/video_coding/codecs/h264/include/h264.h"
+#include "webrtc/modules/video_coding/codecs/vp8/include/vp8.h"
+#include "webrtc/modules/video_coding/codecs/vp9/include/vp9.h"
 #include "webrtc/test/fake_decoder.h"
-#include "webrtc/video_decoder.h"
 
 namespace webrtc {
 namespace test {
@@ -85,11 +87,11 @@ VideoReceiveStream::Decoder CreateMatchingDecoder(
   decoder.payload_type = encoder_settings.payload_type;
   decoder.payload_name = encoder_settings.payload_name;
   if (encoder_settings.payload_name == "H264") {
-    decoder.decoder = VideoDecoder::Create(VideoDecoder::kH264);
+    decoder.decoder = H264Decoder::Create();
   } else if (encoder_settings.payload_name == "VP8") {
-    decoder.decoder = VideoDecoder::Create(VideoDecoder::kVp8);
+    decoder.decoder = VP8Decoder::Create();
   } else if (encoder_settings.payload_name == "VP9") {
-    decoder.decoder = VideoDecoder::Create(VideoDecoder::kVp9);
+    decoder.decoder = VP9Decoder::Create();
   } else {
     decoder.decoder = new FakeDecoder();
   }