Revert of High resolution timer fix for Windows

base/message_loop/incoming_task_queue.h

Index: base/message_loop/incoming_task_queue.h
diff --git a/base/message_loop/incoming_task_queue.h b/base/message_loop/incoming_task_queue.h
index 30f26033a2d5d61d66153c36a66cff2f1e1c33cd..56c5638295b8440cdcad41871f28e71eb7ee16e8 100644
--- a/base/message_loop/incoming_task_queue.h
+++ b/base/message_loop/incoming_task_queue.h
@@ -38,17 +38,16 @@
                           TimeDelta delay,
                           bool nestable);
 
-  // Returns true if the queue contains tasks that require higher than default
-  // timer resolution. Currently only needed for Windows.
-  bool HasHighResolutionTasks();
+  // Returns true if the message loop has high resolution timers enabled.
+  // Provided for testing.
+  bool IsHighResolutionTimerEnabledForTesting();
 
   // Returns true if the message loop is "idle". Provided for testing.
   bool IsIdleForTesting();
 
   // Loads tasks from the |incoming_queue_| into |*work_queue|. Must be called
-  // from the thread that is running the loop. Returns the number of tasks that
-  // require high resolution timers.
-  int ReloadWorkQueue(TaskQueue* work_queue);
+  // from the thread that is running the loop.
+  void ReloadWorkQueue(TaskQueue* work_queue);
 
   // Disconnects |this| from the parent message loop.
   void WillDestroyCurrentMessageLoop();
@@ -66,11 +65,12 @@
   // does not retain |pending_task->task| beyond this function call.
   bool PostPendingTask(PendingTask* pending_task);
 
-  // Number of tasks that require high resolution timing. This value is kept
-  // so that ReloadWorkQueue() completes in constant time.
-  int high_res_task_count_;
+#if defined(OS_WIN)
+  TimeTicks high_resolution_timer_expiration_;
+#endif
 
-  // The lock that protects access to the members of this class.
+  // The lock that protects access to |incoming_queue_|, |message_loop_| and
+  // |next_sequence_num_|.
   base::Lock incoming_queue_lock_;
 
   // An incoming queue of tasks that are acquired under a mutex for processing