MediaLog: Log selected audio/video decoder name.

media/filters/video_frame_stream_unittest.cc

Index: media/filters/video_frame_stream_unittest.cc
diff --git a/media/filters/video_frame_stream_unittest.cc b/media/filters/video_frame_stream_unittest.cc
index e36172cf5986868a0165e3eba883b3e1e4fed147..3a954155eb52deeae778541bf1c18581ecbfd694 100644
--- a/media/filters/video_frame_stream_unittest.cc
+++ b/media/filters/video_frame_stream_unittest.cc
@@ -43,6 +43,8 @@ ACTION_P(ReportCallback, verifier) {
 
 namespace media {
 
+static void LogFunc(const std::string& str) { DVLOG(1) << str; }
+
 struct VideoFrameStreamTestParams {
   VideoFrameStreamTestParams(bool is_encrypted,
                              int decoding_delay,
@@ -82,7 +84,8 @@ class VideoFrameStreamTest
         message_loop_.message_loop_proxy(),
         decoders.Pass(),
         base::Bind(&VideoFrameStreamTest::SetDecryptorReadyCallback,
-                   base::Unretained(this))));
+                   base::Unretained(this)),
+        base::Bind(&LogFunc)));
 
     // Decryptor can only decrypt (not decrypt-and-decode) so that
     // DecryptingDemuxerStream will be used.