Mac: Split SystemMonitor initialization so it's not blocked by the Sandbox.

base/system_monitor/system_monitor.h

Index: base/system_monitor/system_monitor.h
diff --git a/base/system_monitor/system_monitor.h b/base/system_monitor/system_monitor.h
index e2de14cb56104776e6afdcca1fed727556d56254..78ab50a38cda9417501501803a977490d11b1ab1 100644
--- a/base/system_monitor/system_monitor.h
+++ b/base/system_monitor/system_monitor.h
@@ -50,6 +50,14 @@ class BASE_API SystemMonitor {
   // Get the application-wide SystemMonitor (if not present, returns NULL).
   static SystemMonitor* Get();
 
+#if defined(OS_MACOSX)
+  // Allocate system resources needed by the SystemMonitor class.
+  //
+  // This function must be called before instantiating an instance of the class
+  // and before the Sandbox is initialized.
+  static void AllocateSystemIOPorts();
+#endif
+
   //
   // Power-related APIs
   //
@@ -130,11 +138,6 @@ class BASE_API SystemMonitor {
   base::OneShotTimer<SystemMonitor> delayed_battery_check_;
 #endif
 
-#if defined(OS_MACOSX)
-  IONotificationPortRef notification_port_ref_;
-  io_object_t notifier_object_;
-#endif
-
   DISALLOW_COPY_AND_ASSIGN(SystemMonitor);
 };