Created multi-process-friendly PowerMonitor interface.

content/worker/worker_main.cc

Index: content/worker/worker_main.cc
diff --git a/content/worker/worker_main.cc b/content/worker/worker_main.cc
index 9e9f79f0bcf2033f4d2a3b1fcc7004f663a6e842..79345cf59342b7c27c0a492f72dbbd071368e9ea 100644
--- a/content/worker/worker_main.cc
+++ b/content/worker/worker_main.cc
@@ -5,10 +5,8 @@
 #include "base/base_switches.h"
 #include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
-#include "base/power_monitor/power_monitor.h"
 #include "base/strings/string_util.h"
 #include "base/threading/platform_thread.h"
-#include "base/timer/hi_res_timer_manager.h"
 #include "content/child/child_process.h"
 #include "content/common/sandbox_linux.h"
 #include "content/public/common/main_function_params.h"
@@ -31,9 +29,6 @@ int WorkerMain(const MainFunctionParams& parameters) {
   base::MessageLoop main_message_loop;
   base::PlatformThread::SetName("CrWorkerMain");
 
-  base::PowerMonitor power_monitor;
-  base::HighResolutionTimerManager hi_res_timer_manager;
-
 #if defined(OS_WIN)
   sandbox::TargetServices* target_services =
       parameters.sandbox_info->target_services;