Move BenchTimer to tools as Timer

bench/BenchSysTimer_c.cpp

-
-/*
- * Copyright 2011 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-#include "BenchSysTimer_c.h"
-
-//Time
-#include <time.h>
-
-void BenchSysTimer::startWall() {
-    this->fStartWall = time();
-}
-void BenchSysTimer::startCpu() {
-    this->fStartCpu = clock();
-}
-
-double BenchSysTimer::endCpu() {
-    clock_t end_cpu = clock();
-    this->fCpu = (end_cpu - this->fStartCpu) * CLOCKS_PER_SEC / 1000.0;
-}
-double BenchSysTimer::endWall() {
-    time_t end_wall = time();
-    this->fWall = difftime(end_wall, this->fstartWall) / 1000.0;
-}