[Telemetry] Reorganize everything.

tools/telemetry/telemetry/page_benchmark_value.py

-# Copyright (c) 2012 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.
-from telemetry.perf_tests_helper import GeomMeanAndStdDevFromHistogram
-
-def _Mean(l):
-  return float(sum(l)) / len(l) if len(l) > 0 else 0.0
-
-class PageBenchmarkValue(object):
-  def __init__(self, trace_name, units, value, chart_name, data_type):
-    self.trace_name = trace_name
-    self.units = units
-    self.value = value
-    self.chart_name = chart_name
-    self.data_type = data_type
-
-  @property
-  def measurement_name(self):
-    if self.chart_name:
-      return '%s.%s' % (self.chart_name, self.trace_name)
-    else:
-      return self.trace_name
-
-  @property
-  def output_value(self):
-    if self.data_type == 'histogram':
-      (mean, _) = GeomMeanAndStdDevFromHistogram(self.value)
-      return mean
-    elif isinstance(self.value, list):
-      return _Mean(self.value)
-    else:
-      return self.value