Fix a bunch of IWYU violators that don't include scoped_ptr.h

content/renderer/media/audio_repetition_detector_unittest.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stddef.h>
 
 #include <map>
 
 #include "base/bind.h"
 #include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/rand_util.h"
 #include "content/renderer/media/audio_repetition_detector.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace content {
 
 namespace {
 const int kDefaultMinLengthMs = 1;
 const size_t kDefaultMaxFrames = 480;  // 10 ms * 48 kHz
 
@@ skipping 326 matching lines @@
   // We only expect a repetition with 100 ms look back time.
   expect_counts[2].count = 1;
 
   SetDetector(kDefaultMinLengthMs, kDefaultMaxFrames, kLookbackTimes,
               arraysize(kLookbackTimes));
   Verify(expect_counts, arraysize(expect_counts), test_signal, kSamples,
          kNormalSampleRateHz);
 }
 
 }  // namespace content