Convert MediaLog from being ref counted to owned by WebMediaPlayer.

media/filters/decrypting_video_decoder_unittest.cc

Index: media/filters/decrypting_video_decoder_unittest.cc
diff --git a/media/filters/decrypting_video_decoder_unittest.cc b/media/filters/decrypting_video_decoder_unittest.cc
index 7f1b02966faa921470f1013036b1bf3027f97597..2f9c0b6d6d059220b0c02d8634b510c312c1adc0 100644
--- a/media/filters/decrypting_video_decoder_unittest.cc
+++ b/media/filters/decrypting_video_decoder_unittest.cc
@@ -50,7 +50,7 @@ class DecryptingVideoDecoderTest : public testing::Test {
   DecryptingVideoDecoderTest()
       : decoder_(new DecryptingVideoDecoder(
             message_loop_.task_runner(),
-            new MediaLog(),
+            &media_log_,
             base::Bind(&DecryptingVideoDecoderTest::OnWaitingForDecryptionKey,
                        base::Unretained(this)))),
         cdm_context_(new StrictMock<MockCdmContext>()),
@@ -223,6 +223,7 @@ class DecryptingVideoDecoderTest : public testing::Test {
   MOCK_METHOD0(OnWaitingForDecryptionKey, void(void));
 
   base::MessageLoop message_loop_;
+  MediaLog media_log_;
   std::unique_ptr<DecryptingVideoDecoder> decoder_;
   std::unique_ptr<StrictMock<MockCdmContext>> cdm_context_;
   std::unique_ptr<StrictMock<MockDecryptor>> decryptor_;