Remove the [Un]RegisterVoiceProcessor() API.

talk/media/base/voiceprocessor.h

 /*
  * libjingle
  * Copyright 2004 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
  *     this list of conditions and the following disclaimer in the documentation
  *     and/or other materials provided with the distribution.
  *  3. The name of the author may not be used to endorse or promote products
  *     derived from this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef TALK_MEDIA_BASE_VOICEPROCESSOR_H_
-#define TALK_MEDIA_BASE_VOICEPROCESSOR_H_
-
-#include "webrtc/base/basictypes.h"
-#include "webrtc/base/sigslot.h"
-
-namespace cricket {
-
-class AudioFrame;
-
-enum MediaProcessorDirection {
-    MPD_INVALID = 0,
-    MPD_RX = 1 << 0,
-    MPD_TX = 1 << 1,
-    MPD_RX_AND_TX = MPD_RX | MPD_TX,
-};
-
-class VoiceProcessor : public sigslot::has_slots<> {
- public:
-  virtual ~VoiceProcessor() {}
-  // Contents of frame may be manipulated by the processor.
-  // The processed data is expected to be the same size as the
-  // original data.
-  virtual void OnFrame(uint32 ssrc,
-                       MediaProcessorDirection direction,
-                       AudioFrame* frame) = 0;
-};
-
-}  // namespace cricket
-#endif  // TALK_MEDIA_BASE_VOICEPROCESSOR_H_
+// TODO(solenberg): Remove this file once Chromium's libjingle.gyp/.gn are
+//                  updated.