Revert of 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;
+}