Move SystemMonitor to src/chrome/common....

ui/base/system_monitor/system_monitor.h

Index: ui/base/system_monitor/system_monitor.h
===================================================================
--- ui/base/system_monitor/system_monitor.h	(revision 0)
+++ ui/base/system_monitor/system_monitor.h	(working copy)
@@ -1,9 +1,9 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 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.
 
-#ifndef APP_SYSTEM_MONITOR_H_
-#define APP_SYSTEM_MONITOR_H_
+#ifndef UI_BASE_SYSTEM_MONITOR_SYSTEM_MONITOR_H_
+#define UI_BASE_SYSTEM_MONITOR_SYSTEM_MONITOR_H_
 #pragma once
 
 #include "build/build_config.h"
@@ -21,6 +21,8 @@
 #include "base/timer.h"
 #endif  // defined(ENABLE_BATTERY_MONITORING)
 
+namespace ui {
+
 #if defined(OS_MACOSX)
 #ifdef __OBJC__
 @class SystemMonitorBridge;
@@ -136,4 +138,6 @@
   DISALLOW_COPY_AND_ASSIGN(SystemMonitor);
 };
 
-#endif  // APP_SYSTEM_MONITOR_H_
+}  // namespace ui
+
+#endif  // UI_BASE_SYSTEM_MONITOR_SYSTEM_MONITOR_H_