Cache the numberOfProcessors value on posix and expose it to blink

base/base.gypi

 # 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.
 
 {
   'target_defaults': {
     'variables': {
       'base_target': 0,
     },
     'target_conditions': [
@@ skipping 518 matching lines @@
           'synchronization/waitable_event_watcher_win.cc',
           'synchronization/waitable_event_win.cc',
           'system_monitor/system_monitor.cc',
           'system_monitor/system_monitor.h',
           'sys_byteorder.h',
           'sys_info.cc',
           'sys_info.h',
           'sys_info_android.cc',
           'sys_info_chromeos.cc',
           'sys_info_freebsd.cc',
+          'sys_info_internal.h',
           'sys_info_ios.mm',
           'sys_info_linux.cc',
           'sys_info_mac.cc',
           'sys_info_openbsd.cc',
           'sys_info_posix.cc',
           'sys_info_win.cc',
           'task_runner.cc',
           'task_runner.h',
           'task_runner_util.h',
           'template_util.h',
@@ skipping 386 matching lines @@
           ['<(toolkit_uses_gtk) == 1', {
             'sources!': [
               'x11/x11_error_tracker.cc',
             ],
           }],
         ],
       }],
     ],
   },
 }