Revert of Move BenchTimer to tools as Timer

bench/BenchSysTimer_windows.cpp

Index: bench/BenchSysTimer_windows.cpp
diff --git a/bench/BenchSysTimer_windows.cpp b/bench/BenchSysTimer_windows.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..fab657a8c36cbbb0f871e9bc96263d00f77fa33f
--- /dev/null
+++ b/bench/BenchSysTimer_windows.cpp
@@ -0,0 +1,64 @@
+
+/*
+ * 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_windows.h"
+
+//Time
+#define WIN32_LEAN_AND_MEAN 1
+#include <windows.h>
+
+static ULONGLONG winCpuTime() {
+    FILETIME createTime;
+    FILETIME exitTime;
+    FILETIME usrTime;
+    FILETIME sysTime;
+    if (0 == GetProcessTimes(GetCurrentProcess()
+                           , &createTime, &exitTime
+                           , &sysTime, &usrTime))
+    {
+        return 0;
+    }
+    ULARGE_INTEGER start_cpu_sys;
+    ULARGE_INTEGER start_cpu_usr;
+    start_cpu_sys.LowPart  = sysTime.dwLowDateTime;
+    start_cpu_sys.HighPart = sysTime.dwHighDateTime;
+    start_cpu_usr.LowPart  = usrTime.dwLowDateTime;
+    start_cpu_usr.HighPart = usrTime.dwHighDateTime;
+    return start_cpu_sys.QuadPart + start_cpu_usr.QuadPart;
+}
+
+void BenchSysTimer::startWall() {
+    if (0 == ::QueryPerformanceCounter(&this->fStartWall)) {
+        this->fStartWall.QuadPart = 0;
+    }
+}
+void BenchSysTimer::startCpu() {
+    this->fStartCpu = winCpuTime();
+}
+
+double BenchSysTimer::endCpu() {
+    ULONGLONG end_cpu = winCpuTime();
+    return static_cast<double>((end_cpu - this->fStartCpu)) / 10000.0L;
+}
+double BenchSysTimer::endWall() {
+    LARGE_INTEGER end_wall;
+    if (0 == ::QueryPerformanceCounter(&end_wall)) {
+        end_wall.QuadPart = 0;
+    }
+
+    LARGE_INTEGER ticks_elapsed;
+    ticks_elapsed.QuadPart = end_wall.QuadPart - this->fStartWall.QuadPart;
+
+    LARGE_INTEGER frequency;
+    if (0 == ::QueryPerformanceFrequency(&frequency)) {
+        return 0.0L;
+    } else {
+        return static_cast<double>(ticks_elapsed.QuadPart)
+             / static_cast<double>(frequency.QuadPart)
+             * 1000.0L;
+    }
+}