media: Remove SetCdmReadyCB and CdmReadyCB (part 1).

media/base/cdm_context.h

 // Copyright 2014 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_BASE_CDM_CONTEXT_H_
 #define MEDIA_BASE_CDM_CONTEXT_H_
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "media/base/media_export.h"
@@ skipping 50 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(CdmContextProvider);
 };
 
 // Callback to notify that the CdmContext has been completely attached to
 // the media pipeline. Parameter indicates whether the operation succeeded.
 typedef base::Callback<void(bool)> CdmAttachedCB;
 
 // A dummy implementation of CdmAttachedCB.
 MEDIA_EXPORT void IgnoreCdmAttached(bool success);
 
-// Callback to notify that a CDM is ready. CdmAttachedCB is called when the CDM
-// has been completely attached to the media pipeline.
-typedef base::Callback<void(CdmContext*, const CdmAttachedCB&)> CdmReadyCB;
-
-// Callback to set/cancel a CdmReadyCB.
-// Calling this callback with a non-null callback registers CDM ready
-// notification. When the CDM is ready, notification will be sent
-// through the provided callback.
-// Calling this callback with a null callback cancels previously registered CDM
-// ready notification. Any previously provided callback will be fired
-// immediately with NULL.
-typedef base::Callback<void(const CdmReadyCB&)> SetCdmReadyCB;
-
 }  // namespace media
 
 #endif  // MEDIA_BASE_CDM_CONTEXT_H_