Revert of Replace interface VideoCapturerInput with VideoSinkInterface.

webrtc/media/engine/fakewebrtccall.cc

Index: webrtc/media/engine/fakewebrtccall.cc
diff --git a/webrtc/media/engine/fakewebrtccall.cc b/webrtc/media/engine/fakewebrtccall.cc
index 9437fa0fbaec234ec1d81d6815e0da795a84240f..cb904df66fdcf1275bf722ddb6220968bd0bd8ab 100644
--- a/webrtc/media/engine/fakewebrtccall.cc
+++ b/webrtc/media/engine/fakewebrtccall.cc
@@ -103,15 +103,9 @@
     : sending_(false),
       config_(std::move(config)),
       codec_settings_set_(false),
-      source_(nullptr),
       num_swapped_frames_(0) {
   RTC_DCHECK(config.encoder_settings.encoder != NULL);
   ReconfigureVideoEncoder(std::move(encoder_config));
-}
-
-FakeVideoSendStream::~FakeVideoSendStream() {
-  if (source_)
-    source_->RemoveSink(this);
 }
 
 const webrtc::VideoSendStream::Config& FakeVideoSendStream::GetConfig() const {
@@ -168,7 +162,8 @@
   return last_frame_.render_time_ms();
 }
 
-void FakeVideoSendStream::OnFrame(const webrtc::VideoFrame& frame) {
+void FakeVideoSendStream::IncomingCapturedFrame(
+    const webrtc::VideoFrame& frame) {
   ++num_swapped_frames_;
   last_frame_.ShallowCopy(frame);
 }
@@ -209,22 +204,16 @@
   ++num_encoder_reconfigurations_;
 }
 
+webrtc::VideoCaptureInput* FakeVideoSendStream::Input() {
+  return this;
+}
+
 void FakeVideoSendStream::Start() {
   sending_ = true;
 }
 
 void FakeVideoSendStream::Stop() {
   sending_ = false;
-}
-
-void FakeVideoSendStream::SetSource(
-    rtc::VideoSourceInterface<webrtc::VideoFrame>* source) {
-  RTC_DCHECK(source != source_);
-  if (source_)
-    source_->RemoveSink(this);
-  source_ = source;
-  if (source)
-    source->AddOrUpdateSink(this, rtc::VideoSinkWants());
 }
 
 FakeVideoReceiveStream::FakeVideoReceiveStream(