[chromeos/about:power] Collect cpuidle and cpufreq stats

chrome/browser/chromeos/power/power_data_collector.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/chromeos/power/power_data_collector.h"
 
 #include "base/logging.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
 #include "chromeos/dbus/power_manager/power_supply_properties.pb.h"
 
@@ skipping 44 matching lines @@
 
 void PowerDataCollector::SystemResumed(const base::TimeDelta& sleep_duration) {
   SystemResumedSample sample;
   sample.time = base::Time::Now();
   sample.sleep_duration = sleep_duration;
   AddSample(&system_resumed_data_, sample);
 }
 
 PowerDataCollector::PowerDataCollector() {
   DBusThreadManager::Get()->GetPowerManagerClient()->AddObserver(this);
+  cpu_data_collector_.Start();
 }
 
 PowerDataCollector::~PowerDataCollector() {
   DBusThreadManager* dbus_manager = DBusThreadManager::Get();
   CHECK(dbus_manager);
   dbus_manager->GetPowerManagerClient()->RemoveObserver(this);
 }
 
 PowerDataCollector::PowerSupplySample::PowerSupplySample()
     : external_power(false),
       battery_percent(0.0),
       battery_discharge_rate(0.0) {
 }
 
 PowerDataCollector::SystemResumedSample::SystemResumedSample() {
 }
 
 }  // namespace chromeos