Convert MediaLog from being ref counted to owned by WebMediaPlayer.

media/filters/decrypting_demuxer_stream_unittest.cc

Index: media/filters/decrypting_demuxer_stream_unittest.cc
diff --git a/media/filters/decrypting_demuxer_stream_unittest.cc b/media/filters/decrypting_demuxer_stream_unittest.cc
index e6a57e2dc27402b5dd83f0113cf82dc408e43faf..8e0e457fc45df92fe889da2d63046bca09638e48 100644
--- a/media/filters/decrypting_demuxer_stream_unittest.cc
+++ b/media/filters/decrypting_demuxer_stream_unittest.cc
@@ -62,7 +62,7 @@ class DecryptingDemuxerStreamTest : public testing::Test {
   DecryptingDemuxerStreamTest()
       : demuxer_stream_(new DecryptingDemuxerStream(
             message_loop_.task_runner(),
-            new MediaLog(),
+            &media_log_,
             base::Bind(&DecryptingDemuxerStreamTest::OnWaitingForDecryptionKey,
                        base::Unretained(this)))),
         cdm_context_(new StrictMock<MockCdmContext>()),
@@ -254,6 +254,7 @@ class DecryptingDemuxerStreamTest : public testing::Test {
   MOCK_METHOD0(OnWaitingForDecryptionKey, void(void));
 
   base::MessageLoop message_loop_;
+  MediaLog media_log_;
   std::unique_ptr<DecryptingDemuxerStream> demuxer_stream_;
   std::unique_ptr<StrictMock<MockCdmContext>> cdm_context_;
   std::unique_ptr<StrictMock<MockDecryptor>> decryptor_;