Remove webrtc::VideoDecoder::PrefersLateDecoding.

This is just general cleanup.

The assumed behavior is late decoding, and this function is not used to make any decision (except in the deprecated jitter buffer).

Bug: webrtc:12271
Change-Id: Ifb48186d55903f068f25e44c5f73e7a724f6f456
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/200804
Commit-Queue: Philip Eliasson <philipel@webrtc.org>
Reviewed-by: Sami Kalliomäki <sakal@webrtc.org>
Reviewed-by: Christoffer Rodbro <crodbro@webrtc.org>
Reviewed-by: Erik Språng <sprang@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#32940}

sdk/android/src/java/org/webrtc/AndroidVideoDecoder.java

@@ -291,11 +291,6 @@ class AndroidVideoDecoder implements VideoDecoder, VideoSink {
     return VideoCodecStatus.OK;
   }
 
-  @Override
-  public boolean getPrefersLateDecoding() {
-    return true;
-  }
-
   @Override
   public String getImplementationName() {
     return codecName;

sdk/android/src/jni/video_decoder_wrapper.cc

@@ -144,11 +144,6 @@ int32_t VideoDecoderWrapper::Release() {
   return status;
 }
 
-bool VideoDecoderWrapper::PrefersLateDecoding() const {
-  JNIEnv* jni = AttachCurrentThreadIfNeeded();
-  return Java_VideoDecoder_getPrefersLateDecoding(jni, decoder_);
-}
-
 const char* VideoDecoderWrapper::ImplementationName() const {
   return implementation_name_.c_str();
 }

sdk/android/src/jni/video_decoder_wrapper.h

@@ -47,11 +47,6 @@ class VideoDecoderWrapper : public VideoDecoder {
   // still safe and synchronous.
   int32_t Release() override RTC_NO_THREAD_SAFETY_ANALYSIS;
 
-  // Returns true if the decoder prefer to decode frames late.
-  // That is, it can not decode infinite number of frames before the decoded
-  // frame is consumed.
-  bool PrefersLateDecoding() const override;
-
   const char* ImplementationName() const override;
 
   // Wraps the frame to a AndroidVideoBuffer and passes it to the callback.