SystemMonitor refactoring: move power state monitor into a separate class called PowerMonitor

content/renderer/renderer_main.cc

 // 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.
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 #include "base/debug/debugger.h"
 #include "base/debug/stack_trace.h"
 #include "base/debug/trace_event.h"
 #include "base/hi_res_timer_manager.h"
 #include "base/i18n/rtl.h"
 #include "base/memory/ref_counted.h"
 #include "base/metrics/field_trial.h"
 #include "base/message_loop.h"
 #include "base/metrics/histogram.h"
 #include "base/metrics/statistics_recorder.h"
 #include "base/metrics/stats_counters.h"
 #include "base/path_service.h"
 #include "base/pending_task.h"
+#include "base/power_monitor/power_monitor.h"
 #include "base/process_util.h"
 #include "base/string_util.h"
-#include "base/system_monitor/system_monitor.h"
 #include "base/threading/platform_thread.h"
 #include "base/time.h"
 #include "content/common/pepper_plugin_registry.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/main_function_params.h"
 #include "content/public/renderer/content_renderer_client.h"
 #include "content/renderer/browser_plugin/browser_plugin_manager_impl.h"
 #include "content/renderer/render_process_impl.h"
 #include "content/renderer/render_thread_impl.h"
 #include "content/renderer/renderer_main_platform_delegate.h"
@@ skipping 121 matching lines @@
   main_message_loop.AddTaskObserver(&task_observer);
 
   scoped_ptr<MemoryObserver> memory_observer;
   if (parsed_command_line.HasSwitch(switches::kMemoryMetrics)) {
     memory_observer.reset(new MemoryObserver());
     main_message_loop.AddTaskObserver(memory_observer.get());
   }
 
   base::PlatformThread::SetName("CrRendererMain");
 
-  base::SystemMonitor system_monitor;
+  base::PowerMonitor power_monitor;
   HighResolutionTimerManager hi_res_timer_manager;
 
   platform.PlatformInitialize();
 
   bool no_sandbox = parsed_command_line.HasSwitch(switches::kNoSandbox);
   platform.InitSandboxTests(no_sandbox);
 
   // Initialize histogram statistics gathering system.
   base::StatisticsRecorder::Initialize();
 
@@ skipping 51 matching lines @@
       MessageLoop::current()->Run();
       TRACE_EVENT_END_ETW("RendererMain.START_MSG_LOOP", 0, 0);
     }
   }
   platform.PlatformUninitialize();
   TRACE_EVENT_END_ETW("RendererMain", 0, "");
   return 0;
 }
 
 }  // namespace content