Move and rename FdopenPlatformFile to file_util

base/platform_file_win.cc

Index: base/platform_file_win.cc
diff --git a/base/platform_file_win.cc b/base/platform_file_win.cc
index 351d25c886adb170a48baab3d06d4f6f0943eed3..af786ab090a3150935b9a255816f0422dd6c3566 100644
--- a/base/platform_file_win.cc
+++ b/base/platform_file_win.cc
@@ -13,15 +13,6 @@
 
 namespace base {
 
-FILE* FdopenPlatformFile(PlatformFile file, const char* mode) {
-  if (file == kInvalidPlatformFileValue)
-    return NULL;
-  int fd = _open_osfhandle(reinterpret_cast<intptr_t>(file), 0);
-  if (fd < 0)
-    return NULL;
-  return _fdopen(fd, mode);
-}
-
 bool ClosePlatformFile(PlatformFile file) {
   base::ThreadRestrictions::AssertIOAllowed();
   return (CloseHandle(file) != 0);