Prepare for removal of source_filter.gypi:

runtime/bin/utils_win.cc

Index: runtime/bin/utils_win.cc
===================================================================
--- runtime/bin/utils_win.cc	(revision 18775)
+++ runtime/bin/utils_win.cc	(working copy)
@@ -2,9 +2,12 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-#include <errno.h>
-#include <time.h>
+#include "platform/globals.h"
+#if defined(TARGET_OS_WINDOWS)
 
+#include <errno.h>  // NOLINT
+#include <time.h>  // NOLINT
+
 #include "bin/utils.h"
 #include "bin/log.h"
 
@@ -137,3 +140,5 @@
   GetSystemTimeAsFileTime(&time.ft_);
   return (time.t_ - kTimeEpoc) / kTimeScaler;
 }
+
+#endif  // defined(TARGET_OS_WINDOWS)