Switch [String]FileWriter to use new file_io.h functions/types

util/win/scoped_handle.cc

 // Copyright 2014 The Crashpad Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
 #include "util/win/scoped_handle.h"
 
 #include "base/logging.h"
+#include "util/file/file_io.h"
 
 namespace crashpad {
 namespace internal {
 
 void ScopedFileHANDLECloseTraits::Free(HANDLE handle) {
-  PCHECK(CloseHandle(handle));
+  CheckedCloseFile(handle);
 }
 
 void ScopedKernelHANDLECloseTraits::Free(HANDLE handle) {
   PCHECK(CloseHandle(handle));
 }
 
 }  // namespace internal
 }  // namespace crashpad