Move array_view.h to webrtc/api/

webrtc/modules/audio_processing/test/echo_canceller_test_tools_unittest.cc

 /*
  *  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.
  */
 
 #include "webrtc/modules/audio_processing/test/echo_canceller_test_tools.h"
 
 #include <vector>
 
-#include "webrtc/rtc_base/array_view.h"
+#include "webrtc/api/array_view.h"
 #include "webrtc/rtc_base/checks.h"
 #include "webrtc/rtc_base/random.h"
 #include "webrtc/test/gtest.h"
 
 namespace webrtc {
 
 TEST(EchoCancellerTestTools, FloatDelayBuffer) {
   constexpr size_t kDelay = 10;
   DelayBuffer<float> delay_buffer(kDelay);
   std::vector<float> v(1000, 0.f);
@@ skipping 36 matching lines @@
   std::vector<float> v(50, 0.f);
   std::vector<float> v_ref = v;
   RandomizeSampleVector(&random_generator, v);
   EXPECT_NE(v, v_ref);
   v_ref = v;
   RandomizeSampleVector(&random_generator, v);
   EXPECT_NE(v, v_ref);
 }
 
 }  // namespace webrtc