Revert of Replace the remaining scoped_ptr with unique_ptr in webrtc/modules/

webrtc/modules/video_coding/packet_buffer.h

 /*
  *  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_MODULES_VIDEO_CODING_PACKET_BUFFER_H_
 #define WEBRTC_MODULES_VIDEO_CODING_PACKET_BUFFER_H_
 
 #include <array>
 #include <vector>
 #include <map>
-#include <memory>
 #include <set>
 #include <queue>
 
 #include "webrtc/base/criticalsection.h"
+#include "webrtc/base/scoped_ptr.h"
 #include "webrtc/base/thread_annotations.h"
 #include "webrtc/modules/video_coding/packet.h"
 #include "webrtc/modules/video_coding/sequence_number_util.h"
 
 namespace webrtc {
 namespace video_coding {
 
 class FrameObject;
 class RtpFrameObject;
 
@@ skipping 139 matching lines @@
   // layer given a Tl0 picture index.
   std::map<uint8_t,
           std::array<int16_t, kMaxTemporalLayer>,
           DescendingSeqNumComp<uint8_t>> layer_info_ GUARDED_BY(crit_);
 };
 
 }  // namespace video_coding
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_VIDEO_CODING_PACKET_BUFFER_H_