Time singleton and resolution changes.

base/time.h

 // Copyright (c) 2006-2008 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.
 
 // Time represents an absolute point in time, internally represented as
 // microseconds (s/1,000,000) since a platform-dependent epoch.  Each
 // platform's epoch, along with other system-dependent clock interface
 // routines, is defined in time_PLATFORM.cc.
 //
 // TimeDelta represents a duration of time, internally represented in
@@ skipping 418 matching lines @@
 
   // Please use Now() to create a new object. This is for internal use
   // and testing. Ticks is in microseconds.
   explicit TimeTicks(int64 ticks) : ticks_(ticks) {
   }
 
   // Tick count in microseconds.
   int64 ticks_;
 
 #if defined(OS_WIN)
-  // The function to use for counting ticks.
-  typedef int (__stdcall *TickFunction)(void);
-  static TickFunction tick_function_;
+  typedef DWORD (__stdcall *TickFunctionType)(void);
+  static TickFunctionType SetMockTickFunction(TickFunctionType ticker);
 #endif
 };
 
 inline TimeTicks TimeDelta::operator+(TimeTicks t) const {
   return TimeTicks(t.ticks_ + delta_);
 }
 
 #endif  // BASE_TIME_H_