Deprecate VideoDecoder::Reset() and remove calls.

webrtc/test/fake_decoder.cc

Index: webrtc/test/fake_decoder.cc
diff --git a/webrtc/test/fake_decoder.cc b/webrtc/test/fake_decoder.cc
index dbdd580e886edc4ea79fcfb31e3c0a6554dbcf75..ef8f8879ae892f46edb6aadf647f6a9e7984a34c 100644
--- a/webrtc/test/fake_decoder.cc
+++ b/webrtc/test/fake_decoder.cc
@@ -54,10 +54,6 @@ int32_t FakeDecoder::Release() {
   return WEBRTC_VIDEO_CODEC_OK;
 }
 
-int32_t FakeDecoder::Reset() {
-  return WEBRTC_VIDEO_CODEC_OK;
-}
-
 const char* FakeDecoder::kImplementationName = "fake_decoder";
 const char* FakeDecoder::ImplementationName() const {
   return kImplementationName;