Encrypted Media: Replace DecryptorClient with key event callbacks.

media/filters/audio_decoder_selector_unittest.cc

Index: media/filters/audio_decoder_selector_unittest.cc
diff --git a/media/filters/audio_decoder_selector_unittest.cc b/media/filters/audio_decoder_selector_unittest.cc
index 7b0631a1ecb034754517b8f7d2204bc24e415958..f8792cce650614d4b33decef62d4e35200ad3b57 100644
--- a/media/filters/audio_decoder_selector_unittest.cc
+++ b/media/filters/audio_decoder_selector_unittest.cc
@@ -108,7 +108,7 @@ class AudioDecoderSelectorTest : public ::testing::Test {
   AudioDecoderConfig encrypted_audio_config_;
   scoped_refptr<StrictMock<MockDemuxerStream> > demuxer_stream_;
   // Use NiceMock since we don't care about most of calls on the decryptor, e.g.
-  // RegisterKeyAddedCB().
+  // RegisterNewKeyCB().
   scoped_ptr<NiceMock<MockDecryptor> > decryptor_;
   scoped_refptr<StrictMock<MockAudioDecoder> > decoder_1_;
   scoped_refptr<StrictMock<MockAudioDecoder> > decoder_2_;