Encrypted Media: Support Audio Decrypt-Only.

media/base/audio_renderer.h

Index: media/base/audio_renderer.h
diff --git a/media/base/audio_renderer.h b/media/base/audio_renderer.h
index 19459ac62dac7ab82c89bff38f14d751bcbcbf22..8645000ded8d886c76f2cb00013f974354ffc32f 100644
--- a/media/base/audio_renderer.h
+++ b/media/base/audio_renderer.h
@@ -10,6 +10,7 @@
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/time.h"
+#include "media/base/decryptor.h"
 #include "media/base/media_export.h"
 #include "media/base/pipeline_status.h"
 
@@ -48,6 +49,7 @@ class MEDIA_EXPORT AudioRenderer
   // |error_cb| is executed if an error was encountered.
   virtual void Initialize(const scoped_refptr<DemuxerStream>& stream,
                           const AudioDecoderList& decoders,
+                          const SetDecryptorReadyCB& set_decryptor_ready_cb,
                           const PipelineStatusCB& init_cb,
                           const StatisticsCB& statistics_cb,
                           const base::Closure& underflow_cb,