Decryptors can report kNoKey to WebMediaPlayer

media/filters/decrypting_video_decoder.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.
 
 #ifndef MEDIA_FILTERS_DECRYPTING_VIDEO_DECODER_H_
 #define MEDIA_FILTERS_DECRYPTING_VIDEO_DECODER_H_
 
 #include "base/callback.h"
 #include "base/memory/weak_ptr.h"
 #include "media/base/decryptor.h"
@@ skipping 10 matching lines @@
 class Decryptor;
 
 // Decryptor-based VideoDecoder implementation that can decrypt and decode
 // encrypted video buffers and return decrypted and decompressed video frames.
 // All public APIs and callbacks are trampolined to the |task_runner_| so
 // that no locks are required for thread safety.
 class MEDIA_EXPORT DecryptingVideoDecoder : public VideoDecoder {
  public:
   DecryptingVideoDecoder(
       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
-      const SetDecryptorReadyCB& set_decryptor_ready_cb);
+      const SetDecryptorReadyCB& set_decryptor_ready_cb,
+      const base::Closure& waiting_for_decryption_key_cb);
   ~DecryptingVideoDecoder() override;
 
   // VideoDecoder implementation.
   std::string GetDisplayName() const override;
   void Initialize(const VideoDecoderConfig& config,
                   bool low_delay,
                   const PipelineStatusCB& status_cb,
                   const OutputCB& output_cb) override;
   void Decode(const scoped_refptr<DecoderBuffer>& buffer,
               const DecodeCB& decode_cb) override;
@@ skipping 39 matching lines @@
   void DoReset();
 
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
 
   State state_;
 
   PipelineStatusCB init_cb_;
   OutputCB output_cb_;
   DecodeCB decode_cb_;
   base::Closure reset_cb_;
+  base::Closure waiting_for_decryption_key_cb_;
 
   VideoDecoderConfig config_;
 
   // Callback to request/cancel decryptor creation notification.
   SetDecryptorReadyCB set_decryptor_ready_cb_;
 
   Decryptor* decryptor_;
 
   // The buffer that needs decrypting/decoding.
   scoped_refptr<media::DecoderBuffer> pending_buffer_to_decode_;
@@ skipping 11 matching lines @@
 
   base::WeakPtr<DecryptingVideoDecoder> weak_this_;
   base::WeakPtrFactory<DecryptingVideoDecoder> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DecryptingVideoDecoder);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_DECRYPTING_VIDEO_DECODER_H_