Revert of SkTime::GetNSecs()

tools/timer/SysTimer_mach.h

Index: tools/timer/SysTimer_mach.h
diff --git a/tools/timer/SysTimer_mach.h b/tools/timer/SysTimer_mach.h
new file mode 100644
index 0000000000000000000000000000000000000000..8c21d57b36723106f8e4750fa8f8f167b4ee33a7
--- /dev/null
+++ b/tools/timer/SysTimer_mach.h
@@ -0,0 +1,24 @@
+/*
+ * 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 SysTimer_DEFINED
+#define SysTimer_DEFINED
+
+#include <mach/mach.h>
+#include <mach/mach_time.h>
+
+class SysTimer {
+public:
+    void startWall();
+    void startCpu();
+    double endCpu();
+    double endWall();
+private:
+    time_value_t fStartCpu;
+    uint64_t fStartWall;
+};
+
+#endif