Revert 276603 "Cast: Synthetic benchmark tool."

trunk/src/media/cast/test/utility/test_util.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 <math.h>
-
-#include <algorithm>
-
-#include "base/strings/stringprintf.h"
-#include "media/cast/test/utility/test_util.h"
-
-namespace media {
-namespace cast {
-namespace test {
-
-MeanAndError::MeanAndError(const std::vector<double>& values) {
-  double sum = 0.0;
-  double sqr_sum = 0.0;
-  num_values = values.size();
-  if (num_values) {
-    for (size_t i = 0; i < num_values; i++) {
-      sum += values[i];
-      sqr_sum += values[i] * values[i];
-    }
-    mean = sum / num_values;
-    std_dev =
-        sqrt(std::max(0.0, num_values * sqr_sum - sum * sum)) / num_values;
-  }
-}
-
-std::string MeanAndError::AsString() const {
-  return base::StringPrintf("%f +/- %f", mean, std_dev);
-}
-
-}  // namespace test
-}  // namespace cast
-}  // namespace media