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

media/filters/decrypting_demuxer_stream.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_DEMUXER_STREAM_H_
 #define MEDIA_FILTERS_DECRYPTING_DEMUXER_STREAM_H_
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 49 matching lines @@
   // TODO(xhwang): Update this diagram for DecryptingDemuxerStream.
   enum State {
     kUninitialized = 0,
     kDecryptorRequested,
     kIdle,
     kPendingDemuxerRead,
     kPendingDecrypt,
     kWaitingForKey
   };
 
-  // Callback for DecryptorHost::RequestDecryptor().
-  void SetDecryptor(Decryptor* decryptor);
+  // Callback for DecryptorHost::RequestDecryptor(). |done_cb| is called when
+  // complete.

[ddorwin, 2014/07/30 22:35:46]

ditto

+  void SetDecryptor(Decryptor* decryptor, const base::Closure& done_cb);
 
   // Callback for DemuxerStream::Read().
   void DecryptBuffer(DemuxerStream::Status status,
                      const scoped_refptr<DecoderBuffer>& buffer);
 
   void DecryptPendingBuffer();
 
   // Callback for Decryptor::Decrypt().
   void DeliverBuffer(Decryptor::Status status,
                      const scoped_refptr<DecoderBuffer>& decrypted_buffer);
@@ skipping 43 matching lines @@
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<DecryptingDemuxerStream> weak_factory_;
   base::WeakPtr<DecryptingDemuxerStream> weak_this_;
 
   DISALLOW_COPY_AND_ASSIGN(DecryptingDemuxerStream);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_DECRYPTING_DEMUXER_STREAM_H_