Cleanup: move WebRTC related files from chrome/browser/media to chrome/browser/media/webrtc/

chrome/browser/media/webrtc_browsertest_audio.cc

-// Copyright 2014 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 "chrome/browser/media/webrtc_browsertest_audio.h"
-
-#include <stddef.h>
-
-#include "base/files/file.h"
-#include "base/files/file_path.h"
-#include "media/audio/audio_power_monitor.h"
-#include "media/audio/sounds/wav_audio_handler.h"
-#include "media/base/audio_bus.h"
-#include "media/base/audio_parameters.h"
-
-namespace {
-// Opens |wav_filename|, reads it and loads it as a wav file. This function will
-// bluntly trigger CHECKs if we can't read the file or if it's malformed. The
-// caller takes ownership of the returned data. The size of the data is stored
-// in |read_length|.
-std::unique_ptr<char[]> ReadWavFile(const base::FilePath& wav_filename,
-                                    size_t* file_length) {
-  base::File wav_file(
-      wav_filename, base::File::FLAG_OPEN | base::File::FLAG_READ);
-  if (!wav_file.IsValid()) {
-    CHECK(false) << "Failed to read " << wav_filename.value();
-    return nullptr;
-  }
-
-  size_t wav_file_length = wav_file.GetLength();
-
-  std::unique_ptr<char[]> data(new char[wav_file_length]);
-  size_t read_bytes = wav_file.Read(0, data.get(), wav_file_length);
-  if (read_bytes != wav_file_length) {
-    LOG(ERROR) << "Failed to read all bytes of " << wav_filename.value();
-    return nullptr;
-  }
-  *file_length = wav_file_length;
-  return data;
-}
-}  // namespace
-
-namespace test {
-
-float ComputeAudioEnergyForWavFile(const base::FilePath& wav_filename,
-                                   media::AudioParameters* file_parameters) {
-  // Read the file, and put its data in a scoped_ptr so it gets deleted later.
-  size_t file_length = 0;
-  std::unique_ptr<char[]> wav_file_data =
-      ReadWavFile(wav_filename, &file_length);
-  auto wav_audio_handler = media::WavAudioHandler::Create(
-      base::StringPiece(wav_file_data.get(), file_length));
-
-  std::unique_ptr<media::AudioBus> audio_bus = media::AudioBus::Create(
-      wav_audio_handler->num_channels(), wav_audio_handler->total_frames());
-  base::TimeDelta file_duration = wav_audio_handler->GetDuration();
-
-  size_t bytes_written;
-  wav_audio_handler->CopyTo(audio_bus.get(), 0, &bytes_written);
-  CHECK_EQ(bytes_written, wav_audio_handler->data().size())
-      << "Expected to write entire file into bus.";
-
-  // Set the filter coefficient to the whole file's duration; this will make the
-  // power monitor take the entire file into account.
-  media::AudioPowerMonitor power_monitor(wav_audio_handler->sample_rate(),
-                                         file_duration);
-  power_monitor.Scan(*audio_bus, audio_bus->frames());
-
-  file_parameters->Reset(
-      media::AudioParameters::AUDIO_PCM_LOW_LATENCY,
-      media::GuessChannelLayout(wav_audio_handler->num_channels()),
-      wav_audio_handler->sample_rate(), wav_audio_handler->bits_per_sample(),
-      wav_audio_handler->total_frames());
-  file_parameters->set_channels_for_discrete(wav_audio_handler->num_channels());
-
-  return power_monitor.ReadCurrentPowerAndClip().first;
-}
-
-}  // namespace test