Revert of Improve readability of power monitoring code and add additional

tools/telemetry/telemetry/internal/platform/power_monitor/pm_mock.py

-# 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.
-
-class MockBrowserBackend(object):
-  def __init__(self, package):
-    self.package = package
-
-class MockBrowser(object):
-  def __init__(self, package):
-    self._browser_backend = MockBrowserBackend(package)
-
-class MockBattery(object):
-  def __init__(self,
-               power_results,
-               starts_charging=True,
-               voltage=4.0,
-               fuelgauge=None):
-    # voltage in millivolts
-    self._power_results = power_results
-    self._charging = starts_charging
-    self._voltage = voltage
-    self._fuelgauge = fuelgauge if fuelgauge else []
-    self._fuel_idx = 0
-
-  def SupportsFuelGauge(self):
-    return len(self._fuelgauge) >= 0
-
-  def GetFuelGaugeChargeCounter(self):
-    try:
-      x = self._fuelgauge[self._fuel_idx]
-      self._fuel_idx += 1
-      return x
-    except IndexError:
-      assert False, "Too many GetFuelGaugeChargeCounter() calls."
-
-  def GetCharging(self):
-    return self._charging
-
-  def SetCharging(self, charging):
-    if charging:
-      assert not self._charging, "Mock battery already charging."
-      self._charging = True
-    else:
-      assert self._charging, "Mock battery already not charging."
-      self._charging = False
-
-  def GetPowerData(self):
-    return self._power_results
-
-  def GetBatteryInfo(self):
-    # the voltage returned by GetBatteryInfo() is in millivolts
-    return {'voltage': int(self._voltage*1000)}
-
-class MockPlatformBackend(object):
-  def __init__(self, command_dict=None):
-    self._cdict = (command_dict if command_dict else {})
-
-  def RunCommand(self, command):
-    assert command in self._cdict, "Mock platform error: Unexpected command."
-    return self._cdict[command]