Cast: Fix threading issues in VideoEncoderImpl

media/cast/video_sender/video_encoder_impl_unittest.cc

Index: media/cast/video_sender/video_encoder_impl_unittest.cc
diff --git a/media/cast/video_sender/video_encoder_impl_unittest.cc b/media/cast/video_sender/video_encoder_impl_unittest.cc
index 1db0c89f213eeaeb57728bb516146674b63942d5..7fd72427bc67f6c5c9d7d90c82a908f95b5514e0 100644
--- a/media/cast/video_sender/video_encoder_impl_unittest.cc
+++ b/media/cast/video_sender/video_encoder_impl_unittest.cc
@@ -94,6 +94,11 @@ class VideoEncoderImplTest : public ::testing::Test {
         task_runner_, GetDefaultCastSenderLoggingConfig());
   }
 
+  virtual void TearDown() OVERRIDE {
+    video_encoder_.reset();
+    task_runner_->RunTasks();
+  }
+
   void Configure(uint8 max_unacked_frames) {
     video_encoder_.reset(new VideoEncoderImpl(cast_environment_, video_config_,
        max_unacked_frames));