Deprecate VideoDecoder::Reset() and remove calls.

webrtc/video/video_decoder.cc

Index: webrtc/video/video_decoder.cc
diff --git a/webrtc/video/video_decoder.cc b/webrtc/video/video_decoder.cc
index d699175274d54630d14003b613a4651edace018a..d570f9f69d76a65cd39b3544e184affe1470a44f 100644
--- a/webrtc/video/video_decoder.cc
+++ b/webrtc/video/video_decoder.cc
@@ -128,12 +128,6 @@ int32_t VideoDecoderSoftwareFallbackWrapper::Release() {
   return decoder_->Release();
 }
 
-int32_t VideoDecoderSoftwareFallbackWrapper::Reset() {
-  if (fallback_decoder_)
-    fallback_decoder_->Reset();
-  return decoder_->Reset();
-}
-
 bool VideoDecoderSoftwareFallbackWrapper::PrefersLateDecoding() const {
   if (fallback_decoder_)
     return fallback_decoder_->PrefersLateDecoding();