Do not create base::HighResolutionTimerManager in service utility process

content/utility/utility_main.cc

 // Copyright (c) 2011 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/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"
 #include "build/build_config.h"
 #include "content/child/child_process.h"
 #include "content/common/sandbox_linux/sandbox_linux.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/main_function_params.h"
 #include "content/public/common/sandbox_init.h"
 #include "content/utility/utility_thread_impl.h"
@@ skipping 15 matching lines @@
   // Initializes the sandbox before any threads are created.
   // TODO(jorgelo): move this after GTK initialization when we enable a strict
   // Seccomp-BPF policy.
   if (parameters.zygote_child)
     LinuxSandbox::InitializeSandbox();
 #endif
 
   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);
   if (!no_sandbox) {
     sandbox::TargetServices* target_services =
         parameters.sandbox_info->target_services;
     if (!target_services)
       return false;
     char buffer;
     // Ensure RtlGenRandom is warm before the token is lowered; otherwise,
     // base::RandBytes() will CHECK fail when v8 is initialized.
     base::RandBytes(&buffer, sizeof(buffer));
     target_services->LowerToken();
   }
 #endif
 
   base::RunLoop().Run();
 
 #if defined(LEAK_SANITIZER)
   // Invoke LeakSanitizer before shutting down the utility thread, to avoid
   // reporting shutdown-only leaks.
   __lsan_do_leak_check();
 #endif
 
   return 0;
 }
 
 }  // namespace content