Check for CloseHandle failures even when not debugging

base/files/file_util_win.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/files/file_util.h"
 
 #include <windows.h>
 #include <io.h>
 #include <psapi.h>
 #include <shellapi.h>
@@ skipping 213 matching lines @@
   return success;
 }
 
 bool PathExists(const FilePath& path) {
   ThreadRestrictions::AssertIOAllowed();
   return (GetFileAttributes(path.value().c_str()) != INVALID_FILE_ATTRIBUTES);
 }
 
 bool PathIsWritable(const FilePath& path) {
   ThreadRestrictions::AssertIOAllowed();
-  HANDLE dir =
+  win::ScopedHandle dir(
       CreateFile(path.value().c_str(), FILE_ADD_FILE, kFileShareAll,
-                 NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
+                 NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL));
 
-  if (dir == INVALID_HANDLE_VALUE)
-    return false;
-
-  CloseHandle(dir);
-  return true;
+  return dir.IsValid();
 }
 
 bool DirectoryExists(const FilePath& path) {
   ThreadRestrictions::AssertIOAllowed();
   DWORD fileattr = GetFileAttributes(path.value().c_str());
   if (fileattr != INVALID_FILE_ATTRIBUTES)
     return (fileattr & FILE_ATTRIBUTE_DIRECTORY) != 0;
   return false;
 }
 
@@ skipping 548 matching lines @@
     // Like Move, this function is not transactional, so we just
     // leave the copied bits behind if deleting from_path fails.
     // If to_path exists previously then we have already overwritten
     // it by now, we don't get better off by deleting the new bits.
   }
   return false;
 }
 
 }  // namespace internal
 }  // namespace base