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

chrome/nacl/nacl_exe_win_64.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/at_exit.h"
 #include "base/command_line.h"
 #include "base/hi_res_timer_manager.h"
 #include "base/logging.h"
 #include "base/message_loop.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 "chrome/app/breakpad_win.h"
 #include "chrome/common/chrome_result_codes.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/logging_chrome.h"
 #include "chrome/nacl/nacl_broker_listener.h"
 #include "chrome/nacl/nacl_listener.h"
 #include "chrome/nacl/nacl_main_platform_delegate.h"
 #include "content/public/app/startup_helper_win.h"
 #include "content/public/common/main_function_params.h"
 #include "content/public/common/sandbox_init.h"
 #include "sandbox/win/src/sandbox_types.h"
 
 extern int NaClMain(const content::MainFunctionParams&);
 
 // main() routine for the NaCl broker process.
 // This is necessary for supporting NaCl in Chrome on Win64.
 int NaClBrokerMain(const content::MainFunctionParams& parameters) {
   const CommandLine& parsed_command_line = parameters.command_line;
 
   MessageLoopForIO main_message_loop;
   base::PlatformThread::SetName("CrNaClBrokerMain");
 
-  base::SystemMonitor system_monitor;
+  base::PowerMonitor power_monitor;
   HighResolutionTimerManager hi_res_timer_manager;
 
   NaClBrokerListener listener;
   listener.Listen();
 
   return 0;
 }
 
 int APIENTRY wWinMain(HINSTANCE instance, HINSTANCE, wchar_t*, int) {
   sandbox::SandboxInterfaceInfo sandbox_info = {0};
@@ skipping 27 matching lines @@
 
   if (process_type == switches::kNaClLoaderProcess)
     return NaClMain(main_params);
 
   if (process_type == switches::kNaClBrokerProcess)
     return NaClBrokerMain(main_params);
 
   CHECK(false) << "Unknown NaCl 64 process.";
   return -1;
 }