Revert of Prepare for injectable SW decoders

webrtc/media/engine/scopedvideodecoder.h

-/*
- *  Copyright (c) 2017 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_SCOPEDVIDEODECODER_H_
-#define WEBRTC_MEDIA_ENGINE_SCOPEDVIDEODECODER_H_
-
-#include <memory>
-
-#include "webrtc/media/engine/webrtcvideodecoderfactory.h"
-
-namespace cricket {
-
-// Helper function that creates a webrtc::VideoDecoder held by an
-// std::unique_ptr instead of having to be deleted through
-// WebRtcVideoDecoderFactory::DestroyVideoDecoder. The factory passed in must
-// outlive the returned encoder.
-// TODO(andersc): This helper function will be deleted once
-// cricket::WebRtcVideoDecoderFactory is deprecated, see
-// https://bugs.chromium.org/p/webrtc/issues/detail?id=7925 for more info.
-std::unique_ptr<webrtc::VideoDecoder> CreateScopedVideoDecoder(
-    cricket::WebRtcVideoDecoderFactory* factory,
-    webrtc::VideoCodecType type);
-std::unique_ptr<webrtc::VideoDecoder> CreateScopedVideoDecoder(
-    cricket::WebRtcVideoDecoderFactory* factory,
-    webrtc::VideoCodecType type,
-    VideoDecoderParams params);
-
-}  // namespace cricket
-
-#endif  // WEBRTC_MEDIA_ENGINE_SCOPEDVIDEODECODER_H_