Remove onUpdate from systemInfo.cpu API

chrome/browser/extensions/api/system_info_cpu/cpu_info_provider_mac.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 "chrome/browser/extensions/api/system_info_cpu/cpu_info_provider.h"
-
-#include <mach/mach_host.h>
-
-#include "base/mac/scoped_mach_port.h"
-
-namespace extensions {
-
-bool CpuInfoProvider::QueryCpuTimePerProcessor(std::vector<CpuTime>* times) {
-  natural_t num_of_processors;
-  base::mac::ScopedMachPort host(mach_host_self());
-  mach_msg_type_number_t type;
-  processor_cpu_load_info_data_t* cpu_infos;
-
-  if (host_processor_info(host.get(),
-                          PROCESSOR_CPU_LOAD_INFO,
-                          &num_of_processors,
-                          reinterpret_cast<processor_info_array_t*>(&cpu_infos),
-                          &type) == KERN_SUCCESS) {
-    std::vector<CpuTime> results;
-    int64 user = 0, nice = 0, sys = 0, idle = 0;
-
-    for (natural_t i = 0; i < num_of_processors; ++i) {
-      CpuTime time;
-
-      user = static_cast<int64>(cpu_infos[i].cpu_ticks[CPU_STATE_USER]);
-      sys  = static_cast<int64>(cpu_infos[i].cpu_ticks[CPU_STATE_SYSTEM]);
-      nice = static_cast<int64>(cpu_infos[i].cpu_ticks[CPU_STATE_NICE]);
-      idle = static_cast<int64>(cpu_infos[i].cpu_ticks[CPU_STATE_IDLE]);
-
-      time.kernel = sys;
-      time.user = user + nice;
-      time.idle = idle;
-      results.push_back(time);
-    }
-
-    vm_deallocate(mach_task_self(),
-                  reinterpret_cast<vm_address_t>(cpu_infos),
-                  num_of_processors * sizeof(processor_cpu_load_info));
-
-    times->swap(results);
-    return true;
-  }
-
-  return false;
-}
-
-}  // namespace extensions