Decryptors can report kNoKey to WebMediaPlayer

media/base/renderer.h

 // Copyright 2014 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.
 
 #ifndef MEDIA_BASE_RENDERER_H_
 #define MEDIA_BASE_RENDERER_H_
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/time/time.h"
@@ skipping 25 matching lines @@
   // destruction of the caller, so it must be run only prior to returning.
   //
   // Permanent callbacks:
   // - |statistics_cb|: Executed periodically with rendering statistics.
   // - |buffering_state_cb|: Executed when buffering state is changed.
   // - |paint_cb|: Executed when there is a VideoFrame ready to paint.  Can be
   //               ignored if the Renderer handles the painting by itself. Can
   //               be called from any thread.
   // - |ended_cb|: Executed when rendering has reached the end of stream.
   // - |error_cb|: Executed if any error was encountered after initialization.
-  virtual void Initialize(DemuxerStreamProvider* demuxer_stream_provider,
-                          const PipelineStatusCB& init_cb,
-                          const StatisticsCB& statistics_cb,
-                          const BufferingStateCB& buffering_state_cb,
-                          const PaintCB& paint_cb,
-                          const base::Closure& ended_cb,
-                          const PipelineStatusCB& error_cb) = 0;
+  // - |waiting_for_decryption_key_cb|: Executed whenever the key needed to
+  //                                    decrypt the stream is not available.
+  virtual void Initialize(
+      DemuxerStreamProvider* demuxer_stream_provider,
+      const PipelineStatusCB& init_cb,
+      const StatisticsCB& statistics_cb,
+      const BufferingStateCB& buffering_state_cb,
+      const PaintCB& paint_cb,
+      const base::Closure& ended_cb,
+      const PipelineStatusCB& error_cb,
+      const base::Closure& waiting_for_decryption_key_cb) = 0;
 
   // Associates the |cdm_context| with this Renderer for decryption (and
   // decoding) of media data, then fires |cdm_attached_cb| with the result.
   virtual void SetCdm(CdmContext* cdm_context,
                       const CdmAttachedCB& cdm_attached_cb) = 0;
 
   // The following functions must be called after Initialize().
 
   // Discards any buffered data, executing |flush_cb| when completed.
   virtual void Flush(const base::Closure& flush_cb) = 0;
@@ skipping 16 matching lines @@
   // Returns whether |this| renders video.
   virtual bool HasVideo() = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(Renderer);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_RENDERER_H_