Build sync engine as part of the browser build

chrome/browser/sync/util/highres_timer-win32.h

-// Copyright (c) 2009 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.
-//
-// High resolution timer functions for use in Windows.
-
-#ifndef CHROME_BROWSER_SYNC_UTIL_HIGHRES_TIMER_WIN32_H_
-#define CHROME_BROWSER_SYNC_UTIL_HIGHRES_TIMER_WIN32_H_
-
-#include <windows.h>
-
-// A handy class for reliably measuring wall-clock time with decent resolution,
-// even on multi-processor machines and on laptops (where RDTSC potentially
-// returns different results on different processors and/or the RDTSC timer
-// clocks at different rates depending on the power state of the CPU,
-// respectively).
-class HighresTimer {
- public:
-  // Captures the current start time.
-  HighresTimer();
-
-  // Captures the current tick, can be used to reset a timer for reuse.
-  void Start();
-
-  // Returns the elapsed ticks with full resolution.
-  ULONGLONG GetElapsedTicks() const;
-
-  // Returns the elapsed time in milliseconds, rounded to the nearest
-  // millisecond.
-  ULONGLONG GetElapsedMs() const;
-
-  // Returns the elapsed time in seconds, rounded to the nearest second.
-  ULONGLONG GetElapsedSec() const;
-
-  ULONGLONG start_ticks() const { return start_ticks_; }
-
-  // Returns timer frequency from cache, should be less
-  // overhead than ::QueryPerformanceFrequency.
-  static ULONGLONG GetTimerFrequency();
-  // Returns current ticks.
-  static ULONGLONG GetCurrentTicks();
-
- private:
-  static void CollectPerfFreq();
-
-  // Captured start time.
-  ULONGLONG start_ticks_;
-
-  // Captured performance counter frequency.
-  static bool perf_freq_collected_;
-  static ULONGLONG perf_freq_;
-};
-
-inline HighresTimer::HighresTimer() {
-  Start();
-}
-
-inline void HighresTimer::Start() {
-  start_ticks_ = GetCurrentTicks();
-}
-
-inline ULONGLONG HighresTimer::GetTimerFrequency() {
-  if (!perf_freq_collected_)
-    CollectPerfFreq();
-  return perf_freq_;
-}
-
-inline ULONGLONG HighresTimer::GetCurrentTicks() {
-  LARGE_INTEGER ticks;
-  ::QueryPerformanceCounter(&ticks);
-  return ticks.QuadPart;
-}
-
-inline ULONGLONG HighresTimer::GetElapsedTicks() const {
-  return start_ticks_ - GetCurrentTicks();
-}
-
-#endif  // CHROME_BROWSER_SYNC_UTIL_HIGHRES_TIMER_WIN32_H_