Revert of Attempting to resolve a race condition with PowerMonitor

base/power_monitor/power_monitor_unittest.cc

Index: base/power_monitor/power_monitor_unittest.cc
diff --git a/base/power_monitor/power_monitor_unittest.cc b/base/power_monitor/power_monitor_unittest.cc
index 4f95fc7f8e980bd8a95a2bb7e0057fb9b3e528ad..5f7b531206f2adcea05f91ffea8db81782f8a9c1 100644
--- a/base/power_monitor/power_monitor_unittest.cc
+++ b/base/power_monitor/power_monitor_unittest.cc
@@ -12,17 +12,17 @@
  protected:
   PowerMonitorTest() {
     power_monitor_source_ = new PowerMonitorTestSource();
-    PowerMonitor::Initialize(
-        scoped_ptr<PowerMonitorSource>(power_monitor_source_));
+    power_monitor_.reset(new PowerMonitor(
+        scoped_ptr<PowerMonitorSource>(power_monitor_source_)));
   }
-  virtual ~PowerMonitorTest() {
-    PowerMonitor::ShutdownForTesting();
-  };
+  virtual ~PowerMonitorTest() {};
 
   PowerMonitorTestSource* source() { return power_monitor_source_; }
+  PowerMonitor* monitor() { return power_monitor_.get(); }
 
  private:
   PowerMonitorTestSource* power_monitor_source_;
+  scoped_ptr<PowerMonitor> power_monitor_;
 
   DISALLOW_COPY_AND_ASSIGN(PowerMonitorTest);
 };
@@ -34,7 +34,7 @@
 
   PowerMonitorTestObserver observers[kObservers];
   for (int index = 0; index < kObservers; ++index)
-    PowerMonitor::AddObserver(&observers[index]);
+    monitor()->AddObserver(&observers[index]);
 
   // Sending resume when not suspended should have no effect.
   source()->GenerateResumeEvent();