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

ui/base/system_monitor/system_monitor.h

-// 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"
 
 // Windows HiRes timers drain the battery faster so we need to know the battery
 // status.  This isn't true for other platforms.
 #if defined(OS_WIN)
 #define ENABLE_BATTERY_MONITORING 1
 #else
 #undef ENABLE_BATTERY_MONITORING
 #endif  // !OS_WIN
 
 #include "base/observer_list_threadsafe.h"
 #if defined(ENABLE_BATTERY_MONITORING)
 #include "base/timer.h"
 #endif  // defined(ENABLE_BATTERY_MONITORING)
 
+namespace ui {
+
 #if defined(OS_MACOSX)
 #ifdef __OBJC__
 @class SystemMonitorBridge;
 #else
 class SystemMonitorBridge;
 #endif
 #endif
 
 // Class for monitoring various system-related subsystems
 // such as power management, network status, etc.
@@ skipping 95 matching lines @@
   base::OneShotTimer<SystemMonitor> delayed_battery_check_;
 #endif
 
 #if defined(OS_MACOSX)
   SystemMonitorBridge* system_monitor_bridge_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(SystemMonitor);
 };
 
-#endif  // APP_SYSTEM_MONITOR_H_
+}  // namespace ui
+
+#endif  // UI_BASE_SYSTEM_MONITOR_SYSTEM_MONITOR_H_