Revised CL for customisable logging (replacing printfs).

runtime/bin/platform_win.cc

Index: runtime/bin/platform_win.cc
===================================================================
--- runtime/bin/platform_win.cc	(revision 14903)
+++ runtime/bin/platform_win.cc	(working copy)
@@ -2,6 +2,7 @@
 // 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 "bin/log.h"
 #include "bin/platform.h"
 #include "bin/socket.h"
 
@@ -73,7 +74,7 @@
                     NULL);
   if (message_size == 0) {
     if (GetLastError() != ERROR_INSUFFICIENT_BUFFER) {
-      fprintf(stderr, "FormatMessage failed %d\n", GetLastError());
+      Log::PrintErr("FormatMessage failed %d\n", GetLastError());
     }
     snprintf(error, kBufferSize, "OS Error %d", error_code);
   }