Revert of Cast: Fix threading issues in VideoEncoderImpl

media/cast/video_sender/video_sender_unittest.cc

Index: media/cast/video_sender/video_sender_unittest.cc
diff --git a/media/cast/video_sender/video_sender_unittest.cc b/media/cast/video_sender/video_sender_unittest.cc
index 0f2697126cca40b6d4cc9f4beaa5684d63b08eb5..40111f9b0c75db2d09f11fa69fec523379236309 100644
--- a/media/cast/video_sender/video_sender_unittest.cc
+++ b/media/cast/video_sender/video_sender_unittest.cc
@@ -96,11 +96,6 @@
   }
 
   virtual ~VideoSenderTest() {}
-
-  virtual void TearDown() OVERRIDE {
-    video_sender_.reset();
-    task_runner_->RunTasks();
-  }
 
   static void UpdateCastTransportStatus(transport::CastTransportStatus status) {
   }