Build sync engine as part of the browser build

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

-// 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.
-
-#include "chrome/browser/sync/util/highres_timer.h"
-
-bool HighresTimer::perf_freq_collected_ = false;
-ULONGLONG HighresTimer::perf_freq_ = 0;
-
-ULONGLONG HighresTimer::GetElapsedMs() const {
-  ULONGLONG end_time = GetCurrentTicks();
-
-  // Scale to ms and round to nearest ms - rounding is important because
-  // otherwise the truncation error may accumulate e.g. in sums.
-  //
-  // Given infinite resolution, this expression could be written as:
-  //  trunc((end - start (units:freq*sec))/freq (units:sec) *
-  //                1000 (unit:ms) + 1/2 (unit:ms))
-  ULONGLONG freq = GetTimerFrequency();
-  return ((end_time - start_ticks_) * 1000L + freq / 2) / freq;
-}
-
-ULONGLONG HighresTimer::GetElapsedSec() const {
-  ULONGLONG end_time = GetCurrentTicks();
-
-  // Round to nearest ms - rounding is important because otherwise the
-  // truncation error may accumulate e.g. in sums.
-  //
-  // Given infinite resolution, this expression could be written as:
-  //  trunc((end - start (units:freq*sec))/freq (unit:sec) + 1/2 (unit:sec))
-  ULONGLONG freq = GetTimerFrequency();
-  return ((end_time - start_ticks_) + freq / 2) / freq;
-}
-
-void HighresTimer::CollectPerfFreq() {
-  LARGE_INTEGER freq;
-
-  // Note that this is racy. It's OK, however, because even concurrent
-  // executions of this are idempotent.
-  if (::QueryPerformanceFrequency(&freq)) {
-    perf_freq_ = freq.QuadPart;
-    perf_freq_collected_ = true;
-  }
-}