Revert of Cast: Fix threading issues in VideoEncoderImpl

media/cast/test/end2end_unittest.cc

Index: media/cast/test/end2end_unittest.cc
diff --git a/media/cast/test/end2end_unittest.cc b/media/cast/test/end2end_unittest.cc
index ca0a8e8da9d0bf98896e3a8859d6ff05989da49e..34f4af85848a3696f0603f4d24d4631a812f4c82 100644
--- a/media/cast/test/end2end_unittest.cc
+++ b/media/cast/test/end2end_unittest.cc
@@ -457,12 +457,6 @@
   }
 
   virtual ~End2EndTest() {}
-
-  virtual void TearDown() OVERRIDE {
-    cast_sender_.reset();
-    cast_receiver_.reset();
-    task_runner_->RunTasks();
-  }
 
   void SendVideoFrame(int start_value, const base::TimeTicks& capture_time) {
     if (start_time_.is_null())