Decryptors can report kNoKey to WebMediaPlayer

media/renderers/audio_renderer_impl.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Audio rendering unit utilizing an AudioRendererSink to output data.
 //
 // This class lives inside three threads during it's lifetime, namely:
 // 1. Render thread
 //    Where the object is created.
 // 2. Media thread (provided via constructor)
@@ skipping 62 matching lines @@
   base::TimeDelta CurrentMediaTime() override;
   base::TimeDelta CurrentMediaTimeForSyncingVideo() override;
 
   // AudioRenderer implementation.
   void Initialize(DemuxerStream* stream,
                   const PipelineStatusCB& init_cb,
                   const SetDecryptorReadyCB& set_decryptor_ready_cb,
                   const StatisticsCB& statistics_cb,
                   const BufferingStateCB& buffering_state_cb,
                   const base::Closure& ended_cb,
-                  const PipelineStatusCB& error_cb) override;
+                  const PipelineStatusCB& error_cb,
+                  const base::Closure& waiting_for_decryption_key_cb) override;
   TimeSource* GetTimeSource() override;
   void Flush(const base::Closure& callback) override;
   void StartPlaying() override;
   void SetVolume(float volume) override;
 
  private:
   friend class AudioRendererImplTest;
 
   // Important detail: being in kPlaying doesn't imply that audio is being
   // rendered. Rather, it means that the renderer is ready to go. The actual
@@ skipping 171 matching lines @@
 
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<AudioRendererImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioRendererImpl);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_RENDERERS_AUDIO_RENDERER_IMPL_H_