Revert of WebRtcVoiceEngine: Use AudioDecoderFactory to generate recv codecs.

webrtc/media/engine/payload_type_mapper.h

Index: webrtc/media/engine/payload_type_mapper.h
diff --git a/webrtc/media/engine/payload_type_mapper.h b/webrtc/media/engine/payload_type_mapper.h
deleted file mode 100644
index a79fb4756c644f9274fe2fe34b0bb36f74a94f78..0000000000000000000000000000000000000000
--- a/webrtc/media/engine/payload_type_mapper.h
+++ /dev/null
@@ -1,54 +0,0 @@
-/*
- *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#ifndef WEBRTC_MEDIA_ENGINE_PAYLOAD_TYPE_MAPPER_H_
-#define WEBRTC_MEDIA_ENGINE_PAYLOAD_TYPE_MAPPER_H_
-
-#include <map>
-#include <set>
-
-#include "webrtc/base/optional.h"
-#include "webrtc/media/base/codec.h"
-#include "webrtc/modules/audio_coding/codecs/audio_format.h"
-
-namespace cricket {
-
-class PayloadTypeMapper {
- public:
-  PayloadTypeMapper();
-  ~PayloadTypeMapper();
-
-  // Finds the current payload type for |format| or assigns a new one, if no
-  // current mapping exists. Will return an empty value if it was unable to
-  // create a mapping, i.e. if all dynamic payload type ids have been used up.
-  rtc::Optional<int> GetMappingFor(const webrtc::SdpAudioFormat& format);
-
-  // Finds the current payload type for |format|, if any. Returns an empty value
-  // if no payload type mapping exists for the format.
-  rtc::Optional<int> FindMappingFor(const webrtc::SdpAudioFormat& format) const;
-
-  // Like GetMappingFor, but fills in an AudioCodec structure with the necessary
-  // information instead.
-  rtc::Optional<AudioCodec> ToAudioCodec(const webrtc::SdpAudioFormat& format);
-
- private:
-  struct SdpAudioFormatOrdering {
-    bool operator()(const webrtc::SdpAudioFormat& a,
-                    const webrtc::SdpAudioFormat& b) const;
-  };
-
-  int next_unused_payload_type_;
-  int max_payload_type_;
-  std::map<webrtc::SdpAudioFormat, int, SdpAudioFormatOrdering> mappings_;
-  std::set<int> used_payload_types_;
-};
-
-}  // namespace cricket
-#endif  // WEBRTC_MEDIA_ENGINE_PAYLOAD_TYPE_MAPPER_H_