Do not create base::HighResolutionTimerManager in service utility process

content/utility/utility_main.cc

Index: content/utility/utility_main.cc
diff --git a/content/utility/utility_main.cc b/content/utility/utility_main.cc
index e8acf88ea2b5f98385506762b5ee2662e6a205c0..79341050cdff16d3870927627193ca9e5569a7b2 100644
--- a/content/utility/utility_main.cc
+++ b/content/utility/utility_main.cc
@@ -5,6 +5,8 @@
 #include "base/command_line.h"
 #include "base/debug/leak_annotations.h"
 #include "base/message_loop/message_loop.h"
+#include "base/optional.h"
+#include "base/power_monitor/power_monitor.h"
 #include "base/run_loop.h"
 #include "base/threading/platform_thread.h"
 #include "base/timer/hi_res_timer_manager.h"
@@ -40,7 +42,22 @@ int UtilityMain(const MainFunctionParams& parameters) {
   ChildProcess utility_process;
   utility_process.set_main_thread(new UtilityThreadImpl());
 
-  base::HighResolutionTimerManager hi_res_timer_manager;
+  // Both utility process and service utility process would come
+  // here, but the later is launched without connection to service manager, so
+  // there has no base::PowerMonitor be created(See ChildThreadImpl::Init()).
+  // As base::PowerMonitor is necessary to base::HighResolutionTimerManager, for
+  // such case we just disable base::HighResolutionTimerManager for now.
+  // Note that disabling base::HighResolutionTimerManager means high resolution
+  // timer is always disabled no matter on battery or not, but it should have
+  // no any bad influence because currently service utility process is not using
+  // any high resolution timer.
+  // TODO(leonhsl): Once http://crbug.com/646833 got resolved, re-enable
+  // base::HighResolutionTimerManager here for future possible usage of high
+  // resolution timer in service utility process.
+  base::Optional<base::HighResolutionTimerManager> hi_res_timer_manager;
+  if (base::PowerMonitor::Get()) {
+    hi_res_timer_manager.emplace();
+  }
 
 #if defined(OS_WIN)
   bool no_sandbox = parameters.command_line.HasSwitch(switches::kNoSandbox);