diff --git a/pc/videotracksource.cc b/pc/videotracksource.cc
index de87acb21d..bf4fd643a5 100644
--- a/pc/videotracksource.cc
+++ b/pc/videotracksource.cc
@@ -14,13 +14,9 @@
 
 namespace webrtc {
 
-VideoTrackSource::VideoTrackSource(bool remote)
-    : VideoTrackSource(nullptr, remote) {}
-
 VideoTrackSource::VideoTrackSource(
-    rtc::VideoSourceInterface<VideoFrame>* source,
     bool remote)
-    : source_(source), state_(kInitializing), remote_(remote) {
+    : state_(kInitializing), remote_(remote) {
   worker_thread_checker_.DetachFromThread();
 }
 
diff --git a/pc/videotracksource.h b/pc/videotracksource.h
index f3eef3b675..fb6c7be52b 100644
--- a/pc/videotracksource.h
+++ b/pc/videotracksource.h
@@ -24,8 +24,6 @@ namespace webrtc {
 class VideoTrackSource : public Notifier<VideoTrackSourceInterface> {
  public:
   explicit VideoTrackSource(bool remote);
-  // TODO(nisse): Delete, kept only for temporary backwards compatibility.
-  VideoTrackSource(rtc::VideoSourceInterface<VideoFrame>* source, bool remote);
   void SetState(SourceState new_state);
 
   SourceState state() const override { return state_; }
@@ -41,14 +39,10 @@ class VideoTrackSource : public Notifier<VideoTrackSourceInterface> {
   void RemoveSink(rtc::VideoSinkInterface<VideoFrame>* sink) override;
 
  protected:
-  // TODO(nisse): Default implementations for temporary backwards
-  // compatibility.
-  virtual rtc::VideoSourceInterface<VideoFrame>* source() { return source_; }
+  virtual rtc::VideoSourceInterface<VideoFrame>* source() = 0;
 
  private:
   rtc::ThreadChecker worker_thread_checker_;
-  // TODO(nisse): Delete, kept only for temporary backwards compatibility.
-  rtc::VideoSourceInterface<VideoFrame>* source_;
   SourceState state_;
   const bool remote_;
 };