Decryptors can report kNoKey to WebMediaPlayer

media/filters/decrypting_demuxer_stream.cc

Index: media/filters/decrypting_demuxer_stream.cc
diff --git a/media/filters/decrypting_demuxer_stream.cc b/media/filters/decrypting_demuxer_stream.cc
index 601fd4681b7b9b6114971556ead33faf0152b55c..7a6f43ce797854d65faf80280956a061fa244efc 100644
--- a/media/filters/decrypting_demuxer_stream.cc
+++ b/media/filters/decrypting_demuxer_stream.cc
@@ -30,14 +30,17 @@ static bool IsStreamValidAndEncrypted(DemuxerStream* stream) {
 
 DecryptingDemuxerStream::DecryptingDemuxerStream(
     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)
     : task_runner_(task_runner),
       state_(kUninitialized),
+      waiting_for_decryption_key_cb_(waiting_for_decryption_key_cb),
       demuxer_stream_(NULL),
       set_decryptor_ready_cb_(set_decryptor_ready_cb),
       decryptor_(NULL),
       key_added_while_decrypt_pending_(false),
-      weak_factory_(this) {}
+      weak_factory_(this) {
+}
 
 void DecryptingDemuxerStream::Initialize(DemuxerStream* stream,
                                          const PipelineStatusCB& status_cb) {
@@ -311,6 +314,7 @@ void DecryptingDemuxerStream::DeliverBuffer(
     }
 
     state_ = kWaitingForKey;
+    waiting_for_decryption_key_cb_.Run();
     return;
   }