Style fixes for cast_unittest to build

media/cast/video_receiver/video_decoder_unittest.cc

Index: media/cast/video_receiver/video_decoder_unittest.cc
diff --git a/media/cast/video_receiver/video_decoder_unittest.cc b/media/cast/video_receiver/video_decoder_unittest.cc
index e6e3a2d6d2dc0dcc049819de23c2295190b0248a..41cb8b1606b66fc71867505c2db7f017cf00d2c4 100644
--- a/media/cast/video_receiver/video_decoder_unittest.cc
+++ b/media/cast/video_receiver/video_decoder_unittest.cc
@@ -35,7 +35,13 @@ class TestVideoDecoderCallback :
   }
 
   int number_times_called() {return num_called_;}
+
+ protected:
+  virtual ~TestVideoDecoderCallback() {}
+
  private:
+  friend class base::RefCountedThreadSafe<TestVideoDecoderCallback>;
+
   int num_called_;
 };
 
@@ -48,7 +54,7 @@ class VideoDecoderTest : public ::testing::Test {
     video_decoder_callback_ = new TestVideoDecoderCallback();
   }
 
-  ~VideoDecoderTest() {}
+  virtual ~VideoDecoderTest() {}
   virtual void SetUp() {
     task_runner_ = new test::FakeTaskRunner(&testing_clock_);
     cast_thread_ = new CastThread(task_runner_, NULL, NULL,