Make SystemMonitor not a Singleton and move it out of base

app/system_monitor_posix.cc

Index: app/system_monitor_posix.cc
diff --git a/base/system_monitor_posix.cc b/app/system_monitor_posix.cc
similarity index 57%
rename from base/system_monitor_posix.cc
rename to app/system_monitor_posix.cc
index a4a118cdd0ad2ba40ebfd893378e99acf4b24466..5ac7a12138d16b1eb454b5149d948871e471d2d9 100644
--- a/base/system_monitor_posix.cc
+++ b/app/system_monitor_posix.cc
@@ -1,14 +1,10 @@
-// Copyright (c) 2008 The Chromium Authors. All rights reserved.
+// 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.
 
-#include "base/system_monitor.h"
-
-namespace base {
+#include "app/system_monitor.h"
 
 bool SystemMonitor::IsBatteryPower() {
   NOTIMPLEMENTED();
   return false;
 }
-
-} // namespace base