Make SystemMonitor not a Singleton and move it out of base

app/app.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': {
     # TODO: remove this helper when we have loops in GYP
     'apply_locales_cmd': ['python', '../chrome/tools/build/apply_locales.py',],
     'chromium_code': 1,
     'grit_info_cmd': ['python', '../tools/grit/grit_info.py',],
@@ skipping 114 matching lines @@
         'gfx/path.cc',
         'gfx/path_gtk.cc',
         'gfx/path_win.cc',
         'gfx/path.h',
         'gfx/skbitmap_operations.cc',
         'gfx/skbitmap_operations.h',
         'gfx/text_elider.cc',
         'gfx/text_elider.h',
         'gtk_dnd_util.cc',
         'gtk_dnd_util.h',
+        'hi_res_timer_manager_posix.cc',
+        'hi_res_timer_manager_win.cc',
+        'hi_res_timer_manager.h',
         'l10n_util.cc',
         'l10n_util.h',
         'l10n_util_mac.h',
         'l10n_util_mac.mm',
         'l10n_util_posix.cc',
         'l10n_util_win.cc',
         'l10n_util_win.h',
         'message_box_flags.h',
         'os_exchange_data_provider_gtk.cc',
         'os_exchange_data_provider_gtk.h',
         'os_exchange_data_provider_win.cc',
         'os_exchange_data_provider_win.h',
         'os_exchange_data.cc',
         'os_exchange_data.h',
         'resource_bundle.cc',
         'resource_bundle.h',
         'resource_bundle_win.cc',
         'resource_bundle_linux.cc',
         'resource_bundle_mac.mm',
         'slide_animation.cc',
         'slide_animation.h',
         'sql/connection.cc',
         'sql/connection.h',
         'sql/meta_table.cc',
         'sql/meta_table.h',
         'sql/statement.cc',
         'sql/statement.h',
         'sql/transaction.cc',
         'sql/transaction.h',
+        'system_monitor.cc',
+        'system_monitor.h',
+        'system_monitor_posix.cc',
+        'system_monitor_win.cc',
         'table_model.cc',
         'table_model.h',
         'table_model_observer.h',
         'theme_provider.cc',
         'theme_provider.h',
         'throb_animation.cc',
         'throb_animation.h',
         'tree_model.h',
         'tree_node_iterator.h',
         'tree_node_model.h',
@@ skipping 90 matching lines @@
         'gfx/color_utils_unittest.cc',
         'gfx/font_unittest.cc',
         'gfx/icon_util_unittest.cc',
         'gfx/native_theme_win_unittest.cc',
         'gfx/skbitmap_operations_unittest.cc',
         'gfx/text_elider_unittest.cc',
         'l10n_util_mac_unittest.mm',
         'l10n_util_unittest.cc',
         'os_exchange_data_win_unittest.cc',
         'run_all_unittests.cc',
+        'system_monitor_unittest.cc',
         'test_suite.h',
         'sql/connection_unittest.cc',
         'sql/statement_unittest.cc',
         'sql/transaction_unittest.cc',
         'tree_node_iterator_unittest.cc',
         'win_util_unittest.cc',
       ],
       'include_dirs': [
         '..',
       ],
@@ skipping 139 matching lines @@
       ],
     },
   ],
 }
 
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