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 9f4a49b14cb2be2dca1822f3dd706daab2a2b1d1..ed4565b43478cd499eb3867c64efe2ef79152f08 100644
--- a/media/cast/video_sender/video_sender_unittest.cc
+++ b/media/cast/video_sender/video_sender_unittest.cc
@@ -99,6 +99,11 @@ class VideoSenderTest : public ::testing::Test {
 
   virtual ~VideoSenderTest() {}
 
+  virtual void TearDown() OVERRIDE {
+    video_sender_.reset();
+    task_runner_->RunTasks();
+  }
+
   static void UpdateCastTransportStatus(transport::CastTransportStatus status) {
     EXPECT_EQ(status, transport::TRANSPORT_INITIALIZED);
   }