Revert of Move BenchTimer to tools as Timer

bench/BenchSysTimer_mach.h

Index: bench/BenchSysTimer_mach.h
diff --git a/bench/BenchSysTimer_mach.h b/bench/BenchSysTimer_mach.h
new file mode 100644
index 0000000000000000000000000000000000000000..44d0e5eb49a2bda1cecabe5237461fab09cc68ec
--- /dev/null
+++ b/bench/BenchSysTimer_mach.h
@@ -0,0 +1,26 @@
+
+/*
+ * Copyright 2011 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+#ifndef SkBenchSysTimer_DEFINED
+#define SkBenchSysTimer_DEFINED
+
+//Time
+#include <mach/mach.h>
+#include <mach/mach_time.h>
+
+class BenchSysTimer {
+public:
+    void startWall();
+    void startCpu();
+    double endCpu();
+    double endWall();
+private:
+    time_value_t fStartCpu;
+    uint64_t fStartWall;
+};
+
+#endif