media: Remove SetCdmReadyCB and CdmReadyCB (part 1).

media/filters/decrypting_demuxer_stream.h

Index: media/filters/decrypting_demuxer_stream.h
diff --git a/media/filters/decrypting_demuxer_stream.h b/media/filters/decrypting_demuxer_stream.h
index 0bb8ae3b9962d8facb44cb0c9548134a11118338..a5ffe7ab4febdfe0651769e7d4341ca973e2caa6 100644
--- a/media/filters/decrypting_demuxer_stream.h
+++ b/media/filters/decrypting_demuxer_stream.h
@@ -40,7 +40,7 @@ class MEDIA_EXPORT DecryptingDemuxerStream : public DemuxerStream {
   ~DecryptingDemuxerStream() override;
 
   void Initialize(DemuxerStream* stream,
-                  const SetCdmReadyCB& set_cdm_ready_cb,
+                  CdmContext* cdm_context,
                   const PipelineStatusCB& status_cb);
 
   // Cancels all pending operations and fires all pending callbacks. If in
@@ -69,17 +69,12 @@ class MEDIA_EXPORT DecryptingDemuxerStream : public DemuxerStream {
   // TODO(xhwang): Update this diagram for DecryptingDemuxerStream.
   enum State {
     kUninitialized = 0,
-    kDecryptorRequested,
     kIdle,
     kPendingDemuxerRead,
     kPendingDecrypt,
     kWaitingForKey
   };
 
-  // Callback to set CDM. |cdm_attached_cb| is called when the decryptor in the
-  // CDM has been completely attached to the pipeline.
-  void SetCdm(CdmContext* cdm_context, const CdmAttachedCB& cdm_attached_cb);
-
   // Callback for DemuxerStream::Read().
   void DecryptBuffer(DemuxerStream::Status status,
                      const scoped_refptr<DecoderBuffer>& buffer);
@@ -121,9 +116,6 @@ class MEDIA_EXPORT DecryptingDemuxerStream : public DemuxerStream {
   AudioDecoderConfig audio_config_;
   VideoDecoderConfig video_config_;
 
-  // Callback to request/cancel CDM ready notification.
-  SetCdmReadyCB set_cdm_ready_cb_;
-
   Decryptor* decryptor_;
 
   // The buffer returned by the demuxer that needs to be decrypted.