Decryptors can report kNoKey to WebMediaPlayer

media/base/video_renderer.h

Index: media/base/video_renderer.h
diff --git a/media/base/video_renderer.h b/media/base/video_renderer.h
index 1e4433323e6c0bcf3fcafe0b8d365f4ad111b040..7a764b37c5c3b283ccfc43b27392cdbfe4e8338a 100644
--- a/media/base/video_renderer.h
+++ b/media/base/video_renderer.h
@@ -53,15 +53,20 @@ class MEDIA_EXPORT VideoRenderer {
   // |error_cb| is executed if an error was encountered after initialization.
   //
   // |get_time_cb| is used to query the current media playback time.
-  virtual void Initialize(DemuxerStream* stream,
-                          const PipelineStatusCB& init_cb,
-                          const SetDecryptorReadyCB& set_decryptor_ready_cb,
-                          const StatisticsCB& statistics_cb,
-                          const BufferingStateCB& buffering_state_cb,
-                          const PaintCB& paint_cb,
-                          const base::Closure& ended_cb,
-                          const PipelineStatusCB& error_cb,
-                          const TimeDeltaCB& get_time_cb) = 0;
+  //
+  // |waiting_for_decryption_key_cb| is executed whenever the key needed to
+  // decrypt the stream is not available.
+  virtual void Initialize(
+      DemuxerStream* stream,
+      const PipelineStatusCB& init_cb,
+      const SetDecryptorReadyCB& set_decryptor_ready_cb,
+      const StatisticsCB& statistics_cb,
+      const BufferingStateCB& buffering_state_cb,
+      const PaintCB& paint_cb,
+      const base::Closure& ended_cb,
+      const PipelineStatusCB& error_cb,
+      const TimeDeltaCB& get_time_cb,
+      const base::Closure& waiting_for_decryption_key_cb) = 0;
 
   // Discards any video data and stops reading from |stream|, executing
   // |callback| when completed.