Revert of Replace scoped_ptr with unique_ptr in webrtc/common_audio/

webrtc/common_audio/audio_ring_buffer_unittest.cc

 /*
  *  Copyright (c) 2015 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.
  */
 
-#include <memory>
-
 #include "webrtc/common_audio/audio_ring_buffer.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 #include "webrtc/common_audio/channel_buffer.h"
 
 namespace webrtc {
 
 class AudioRingBufferTest :
     public ::testing::TestWithParam< ::testing::tuple<int, int, int, int> > {
 };
 
 void ReadAndWriteTest(const ChannelBuffer<float>& input,
                       size_t num_write_chunk_frames,
                       size_t num_read_chunk_frames,
                       size_t buffer_frames,
                       ChannelBuffer<float>* output) {
   const size_t num_channels = input.num_channels();
   const size_t total_frames = input.num_frames();
   AudioRingBuffer buf(num_channels, buffer_frames);
-  std::unique_ptr<float* []> slice(new float*[num_channels]);
+  rtc::scoped_ptr<float* []> slice(new float* [num_channels]);
 
   size_t input_pos = 0;
   size_t output_pos = 0;
   while (input_pos + buf.WriteFramesAvailable() < total_frames) {
     // Write until the buffer is as full as possible.
     while (buf.WriteFramesAvailable() >= num_write_chunk_frames) {
       buf.Write(input.Slice(slice.get(), input_pos), num_channels,
                 num_write_chunk_frames);
       input_pos += num_write_chunk_frames;
     }
@@ skipping 60 matching lines @@
   buf.MoveReadPositionForward(3);
   ChannelBuffer<float> output(1, kNumChannels);
   buf.Read(output.channels(), kNumChannels, 1);
   EXPECT_EQ(4, output.channels()[0][0]);
   buf.MoveReadPositionBackward(3);
   buf.Read(output.channels(), kNumChannels, 1);
   EXPECT_EQ(2, output.channels()[0][0]);
 }
 
 }  // namespace webrtc