Encrypted Media: Support Audio Decrypt-Only.

media/base/pipeline.h

Index: media/base/pipeline.h
diff --git a/media/base/pipeline.h b/media/base/pipeline.h
index 12371b4e3b511e7233cbfe5746b2110d7a9684a8..a8297539f6e891a148f42a7629e63cc70506a0c6 100644
--- a/media/base/pipeline.h
+++ b/media/base/pipeline.h
@@ -12,6 +12,7 @@
 #include "base/synchronization/lock.h"
 #include "base/threading/thread_checker.h"
 #include "media/base/audio_renderer.h"
+#include "media/base/decryptor.h"
 #include "media/base/demuxer.h"
 #include "media/base/media_export.h"
 #include "media/base/pipeline_status.h"
@@ -129,11 +130,13 @@ class MEDIA_EXPORT Pipeline
   //   |buffering_state_cb| Optional callback that will be executed whenever the
   //                    pipeline's buffering state changes.
   // It is an error to call this method after the pipeline has already started.
-  void Start(scoped_ptr<FilterCollection> filter_collection,
-             const PipelineStatusCB& ended_cb,
-             const PipelineStatusCB& error_cb,
-             const PipelineStatusCB& seek_cb,
-             const BufferingStateCB& buffering_state_cb);
+  void Start(
+      scoped_ptr<FilterCollection> filter_collection,
+      const PipelineStatusCB& ended_cb,
+      const PipelineStatusCB& error_cb,
+      const PipelineStatusCB& seek_cb,
+      const BufferingStateCB& buffering_state_cb,
+      const RequestDecryptorNotificationCB& request_decryptor_notification_cb);
 
   // Asynchronously stops the pipeline, executing |stop_cb| when the pipeline
   // teardown has completed.
@@ -288,11 +291,13 @@ class MEDIA_EXPORT Pipeline
   // The following "task" methods correspond to the public methods, but these
   // methods are run as the result of posting a task to the PipelineInternal's
   // message loop.
-  void StartTask(scoped_ptr<FilterCollection> filter_collection,
-                 const PipelineStatusCB& ended_cb,
-                 const PipelineStatusCB& error_cb,
-                 const PipelineStatusCB& seek_cb,
-                 const BufferingStateCB& buffering_state_cb);
+  void StartTask(
+      scoped_ptr<FilterCollection> filter_collection,
+      const PipelineStatusCB& ended_cb,
+      const PipelineStatusCB& error_cb,
+      const PipelineStatusCB& seek_cb,
+      const BufferingStateCB& buffering_state_cb,
+      const RequestDecryptorNotificationCB& request_decryptor_notification_cb);
 
   // Stops and destroys all filters, placing the pipeline in the kStopped state.
   void StopTask(const base::Closure& stop_cb);
@@ -448,6 +453,7 @@ class MEDIA_EXPORT Pipeline
   PipelineStatusCB ended_cb_;
   PipelineStatusCB error_cb_;
   BufferingStateCB buffering_state_cb_;
+  RequestDecryptorNotificationCB request_decryptor_notification_cb_;
 
   // Renderer references used for setting the volume, playback rate, and
   // determining when playback has finished.