Revert of SkTime::GetNSecs()

src/ports/SkTime_win.cpp

Index: src/ports/SkTime_win.cpp
diff --git a/src/ports/SkTime_win.cpp b/src/ports/SkTime_win.cpp
index 2bd5062c3c6437a1c4bc8197b0ed13ece450294d..19f4695a86bc498c76cb1d81d26e69e63ea70348 100644
--- a/src/ports/SkTime_win.cpp
+++ b/src/ports/SkTime_win.cpp
@@ -39,3 +39,14 @@
         dt->fSecond     = SkToU8(st.wSecond);
     }
 }
+
+SkMSec SkTime::GetMSecs()
+{
+    FILETIME        ft;
+    LARGE_INTEGER   li;
+    GetSystemTimeAsFileTime(&ft);
+    li.LowPart  = ft.dwLowDateTime;
+    li.HighPart = ft.dwHighDateTime;
+    __int64 t  = li.QuadPart;       /* In 100-nanosecond intervals */
+    return (SkMSec)(t / 10000);               /* In milliseconds */
+}