Revert of Replace interface VideoCapturerInput with VideoSinkInterface.

webrtc/video/video_send_stream_tests.cc

Index: webrtc/video/video_send_stream_tests.cc
diff --git a/webrtc/video/video_send_stream_tests.cc b/webrtc/video/video_send_stream_tests.cc
index ba15b17c85b229604bd7ba082e836b00ac54fc4f..8129af9ab2d37b00edce3b03bb8b975807fad310 100644
--- a/webrtc/video/video_send_stream_tests.cc
+++ b/webrtc/video/video_send_stream_tests.cc
@@ -33,7 +33,6 @@
 #include "webrtc/test/call_test.h"
 #include "webrtc/test/configurable_frame_size_encoder.h"
 #include "webrtc/test/fake_texture_frame.h"
-#include "webrtc/test/frame_generator.h"
 #include "webrtc/test/frame_utils.h"
 #include "webrtc/test/null_transport.h"
 #include "webrtc/test/testsupport/perf_test.h"
@@ -1474,10 +1473,8 @@
       handle3, width, height, 5, 5, kVideoRotation_0));
 
   video_send_stream_->Start();
-  test::FrameForwarder forwarder;
-  video_send_stream_->SetSource(&forwarder);
   for (size_t i = 0; i < input_frames.size(); i++) {
-    forwarder.IncomingCapturedFrame(input_frames[i]);
+    video_send_stream_->Input()->IncomingCapturedFrame(input_frames[i]);
     // Do not send the next frame too fast, so the frame dropper won't drop it.
     if (i < input_frames.size() - 1)
       SleepMs(1000 / video_encoder_config_.streams[0].max_framerate);
@@ -1486,7 +1483,6 @@
     observer.WaitOutputFrame();
   }
   video_send_stream_->Stop();
-  video_send_stream_->SetSource(nullptr);
 
   // Test if the input and output frames are the same. render_time_ms and
   // timestamp are not compared because capturer sets those values.