Revert 137960 - Base: Add power requirements to the System monitor.

base/system_monitor/system_monitor.h

Index: base/system_monitor/system_monitor.h
===================================================================
--- base/system_monitor/system_monitor.h	(revision 137975)
+++ base/system_monitor/system_monitor.h	(working copy)
@@ -6,13 +6,10 @@
 #define BASE_SYSTEM_MONITOR_SYSTEM_MONITOR_H_
 #pragma once
 
-#include <map>
 #include <string>
-#include <utility>
 
 #include "base/base_export.h"
 #include "base/basictypes.h"
-#include "base/threading/thread_checker.h"
 #include "build/build_config.h"
 
 // Windows HiRes timers drain the battery faster so we need to know the battery
@@ -49,13 +46,6 @@
     RESUME_EVENT        // The system is being resumed.
   };
 
-  enum PowerRequirement {
-    DISPLAY_REQUIRED,   // The display should not be shut down.
-    SYSTEM_REQUIRED,    // The system should not be suspended.
-    CPU_REQUIRED,       // The process should not be suspended.
-    TEST_REQUIRED       // This is used by unit tests.
-  };
-
   typedef unsigned int DeviceIdType;
 
   // Create SystemMonitor. Only one SystemMonitor instance per application
@@ -155,22 +145,6 @@
                                   const FilePath& path);
   void ProcessMediaDeviceDetached(const DeviceIdType& id);
 
-  // Enters or leaves a period of time with a given |requirement|. If the
-  // operation has multiple requirements, make sure to use a unique |reason| for
-  // each one. Reusing the same |reason| is OK as far as the |requirement| is
-  // the same in every call, and each BeginPowerRequirement call is paired with
-  // a call to EndPowerRequirement. |reason| is expected to be an ASCII string.
-  // Must be called from the thread that created the SystemMonitor.
-  // Warning: Please remember that sleep deprivation is not a good thing; use
-  // with caution.
-  void BeginPowerRequirement(PowerRequirement requirement,
-                             const std::string& reason);
-  void EndPowerRequirement(PowerRequirement requirement,
-                           const std::string& reason);
-
-  // Returns the number of outsanding power requirement requests.
-  size_t GetPowerRequirementsCountForTest() const;
-
  private:
 #if defined(OS_MACOSX)
   void PlatformInit();
@@ -202,11 +176,6 @@
   bool battery_in_use_;
   bool suspended_;
 
-#if defined(OS_WIN)
-  std::map<std::string, std::pair<HANDLE, int> > handles_;
-  base::ThreadChecker thread_checker_;
-#endif
-
 #if defined(ENABLE_BATTERY_MONITORING)
   base::OneShotTimer<SystemMonitor> delayed_battery_check_;
 #endif