Change to Hi Res timers on Windows....

base/time.h

Index: base/time.h
===================================================================
--- base/time.h	(revision 2585)
+++ base/time.h	(working copy)
@@ -348,16 +348,16 @@
   }
 
   // Platform-dependent tick count representing "right now."
-  // The resolution of this clock is ~1-5ms.  Resolution varies depending
+  // The resolution of this clock is ~1-15ms.  Resolution varies depending
   // on hardware/operating system configuration.
   static TimeTicks Now();
 
-  // Returns a platform-dependent high-resolution tick count. IT IS BROKEN ON
-  // SOME HARDWARE and is designed to be used for profiling and perf testing
-  // only (see the impl for more information).
-  static TimeTicks UnreliableHighResNow();
+  // Returns a platform-dependent high-resolution tick count. Implementation
+  // is hardware dependent and may or may not return sub-millisecond
+  // resolution.  THIS CALL IS GENERALLY MUCH MORE EXPENSIVE THAN Now() AND
+  // SHOULD ONLY BE USED WHEN IT IS REALLY NEEDED.
+  static TimeTicks HighResNow();
 
-
   // Returns true if this object has not been initialized.
   bool is_null() const {
     return ticks_ == 0;