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..df2659b4b3684d48db69309619ef0f542bc93929 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"
 
@@ -46,15 +47,17 @@ class MEDIA_EXPORT AudioRenderer
   // executed.
   //
   // |error_cb| is executed if an error was encountered.
-  virtual void Initialize(const scoped_refptr<DemuxerStream>& stream,
-                          const AudioDecoderList& decoders,
-                          const PipelineStatusCB& init_cb,
-                          const StatisticsCB& statistics_cb,
-                          const base::Closure& underflow_cb,
-                          const TimeCB& time_cb,
-                          const base::Closure& ended_cb,
-                          const base::Closure& disabled_cb,
-                          const PipelineStatusCB& error_cb) = 0;
+  virtual void Initialize(
+      const scoped_refptr<DemuxerStream>& stream,
+      const AudioDecoderList& decoders,
+      const RequestDecryptorNotificationCB& request_decryptor_notification_cb,
+      const PipelineStatusCB& init_cb,
+      const StatisticsCB& statistics_cb,
+      const base::Closure& underflow_cb,
+      const TimeCB& time_cb,
+      const base::Closure& ended_cb,
+      const base::Closure& disabled_cb,
+      const PipelineStatusCB& error_cb) = 0;
 
   // Start audio decoding and rendering at the current playback rate, executing
   // |callback| when playback is underway.