Move array_view.h to webrtc/api/

webrtc/modules/audio_processing/level_controller/down_sampler.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_AUDIO_PROCESSING_LEVEL_CONTROLLER_DOWN_SAMPLER_H_
 #define WEBRTC_MODULES_AUDIO_PROCESSING_LEVEL_CONTROLLER_DOWN_SAMPLER_H_
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/level_controller/biquad_filter.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/constructormagic.h"
 
 namespace webrtc {
 
 class ApmDataDumper;
 
 class DownSampler {
  public:
   explicit DownSampler(ApmDataDumper* data_dumper);
   void Initialize(int sample_rate_hz);
 
   void DownSample(rtc::ArrayView<const float> in, rtc::ArrayView<float> out);
 
  private:
   ApmDataDumper* data_dumper_;
   int sample_rate_hz_;
   int down_sampling_factor_;
   BiQuadFilter low_pass_filter_;
 
   RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(DownSampler);
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_PROCESSING_LEVEL_CONTROLLER_DOWN_SAMPLER_H_