Add nanosecond timer.

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 37af9f29f5bb2102c3ef5e44dc28c5872d4403c8..a48a69e88e81ae86330e5236feb2cdac820ea3a8 100644
--- a/src/ports/SkTime_win.cpp
+++ b/src/ports/SkTime_win.cpp
@@ -9,8 +9,7 @@
 
 #include "SkTime.h"
 
-void SkTime::GetDateTime(DateTime* dt)
-{
+void SkTime::GetDateTime(DateTime* dt) {
     if (dt)
     {
         SYSTEMTIME      st;
@@ -26,13 +25,12 @@ void SkTime::GetDateTime(DateTime* dt)
     }
 }
 
-SkMSec SkTime::GetMSecs()
-{
+SkNSec SkTime::GetNSecs() {
     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 */
+    return (SkMSec)(t * 100);
 }