Allow setContentDecryptionModule() to get called when setting is done.

media/filters/decrypting_audio_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_AUDIO_DECODER_H_
 #define MEDIA_FILTERS_DECRYPTING_AUDIO_DECODER_H_
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 48 matching lines @@
     kUninitialized = 0,
     kDecryptorRequested,
     kPendingDecoderInit,
     kIdle,
     kPendingDecode,
     kWaitingForKey,
     kDecodeFinished,
     kError
   };
 
-  // Callback for DecryptorHost::RequestDecryptor().
-  void SetDecryptor(Decryptor* decryptor);
+  // Callback for DecryptorHost::RequestDecryptor(). |decryptor_attached_cb| is
+  // called when the decryptor has been completely attached to the pipeline.
+  void SetDecryptor(Decryptor* decryptor,
+                    const DecryptorAttachedCB& decryptor_attached_cb);
 
   // Initializes the audio decoder on the |decryptor_| with |config_|.
   void InitializeDecoder();
 
   // Callback for Decryptor::InitializeAudioDecoder() during initialization.
   void FinishInitialization(bool success);
 
   void DecodePendingBuffer();
 
   // Callback for Decryptor::DecryptAndDecodeAudio().
@@ skipping 43 matching lines @@
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<DecryptingAudioDecoder> weak_factory_;
   base::WeakPtr<DecryptingAudioDecoder> weak_this_;
 
   DISALLOW_COPY_AND_ASSIGN(DecryptingAudioDecoder);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_DECRYPTING_AUDIO_DECODER_H_