Make SystemMonitor not a Singleton and move it out of base

chrome/chrome.gyp

 # Copyright (c) 2009 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.
 
 {
   'variables': {
     'chromium_code': 1,
 
     'variables': {
       'version_py_path': 'tools/build/version.py',
@@ skipping 748 matching lines @@
           'dependencies': [
             '../build/linux/system.gyp:selinux',
           ],
         }],
         ['OS=="win"', {
           'include_dirs': [
             'third_party/wtl/include',
           ],
         }, { # else: OS != "win"
           'sources!': [
+            'common/hi_res_timer_manager.cc',
+            'common/hi_res_timer_manager.h',
             'common/temp_scaffolding_stubs.h',
           ],
         }],
         ['OS=="win" or OS=="linux"', {
           'sources!': [
             'common/temp_scaffolding_stubs.cc',
           ],
         }],
       ],
     },
@@ skipping 6194 matching lines @@
       ]
     }],
   ],  # 'conditions'
 }
 
 # Local Variables:
 # tab-width:2
 # indent-tabs-mode:nil
 # End:
 # vim: set expandtab tabstop=2 shiftwidth=2: