Revert of Replace scoped_ptr with unique_ptr in webrtc/common_audio/

webrtc/common_audio/fir_filter.cc

 /*
  *  Copyright (c) 2014 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 "webrtc/common_audio/fir_filter.h"
 
 #include <assert.h>
 #include <string.h>
 
-#include <memory>
-
+#include "webrtc/base/scoped_ptr.h"
 #include "webrtc/common_audio/fir_filter_neon.h"
 #include "webrtc/common_audio/fir_filter_sse.h"
 #include "webrtc/system_wrappers/include/cpu_features_wrapper.h"
 
 namespace webrtc {
 
 class FIRFilterC : public FIRFilter {
  public:
   FIRFilterC(const float* coefficients,
              size_t coefficients_length);
 
   void Filter(const float* in, size_t length, float* out) override;
 
  private:
   size_t coefficients_length_;
   size_t state_length_;
-  std::unique_ptr<float[]> coefficients_;
-  std::unique_ptr<float[]> state_;
+  rtc::scoped_ptr<float[]> coefficients_;
+  rtc::scoped_ptr<float[]> state_;
 };
 
 FIRFilter* FIRFilter::Create(const float* coefficients,
                              size_t coefficients_length,
                              size_t max_input_length) {
   if (!coefficients || coefficients_length <= 0 || max_input_length <= 0) {
     assert(false);
     return NULL;
   }
 
@@ skipping 62 matching lines @@
         state_.get(), &in[length - state_length_], state_length_ * sizeof(*in));
   } else {
     memmove(state_.get(),
             &state_[length],
             (state_length_ - length) * sizeof(state_[0]));
     memcpy(&state_[state_length_ - length], in, length * sizeof(*in));
   }
 }
 
 }  // namespace webrtc