Step 2 in porting disk cache to using FilePath.

base/platform_file_win.cc

 // Copyright (c) 2006-2008 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/platform_file.h"
 
+#include "base/file_path.h"
 #include "base/logging.h"
 
 namespace base {
 
-PlatformFile CreatePlatformFile(const std::wstring& name,
+PlatformFile CreatePlatformFile(const FilePath& name,
                                 int flags,
                                 bool* created) {
   DWORD disposition = 0;
 
   if (flags & PLATFORM_FILE_OPEN)
     disposition = OPEN_EXISTING;
 
   if (flags & PLATFORM_FILE_CREATE) {
     DCHECK(!disposition);
     disposition = CREATE_NEW;
@@ skipping 25 matching lines @@
   DWORD create_flags = 0;
   if (flags & PLATFORM_FILE_ASYNC)
     create_flags |= FILE_FLAG_OVERLAPPED;
   if (flags & PLATFORM_FILE_TEMPORARY)
     create_flags |= FILE_ATTRIBUTE_TEMPORARY;
   if (flags & PLATFORM_FILE_HIDDEN)
     create_flags |= FILE_ATTRIBUTE_HIDDEN;
   if (flags & PLATFORM_FILE_DELETE_ON_CLOSE)
     create_flags |= FILE_FLAG_DELETE_ON_CLOSE;
 
-  HANDLE file = CreateFile(name.c_str(), access, sharing, NULL, disposition,
-                           create_flags, NULL);
+  HANDLE file = CreateFile(name.value().c_str(), access, sharing, NULL,
+                           disposition, create_flags, NULL);
 
   if ((flags & PLATFORM_FILE_OPEN_ALWAYS) && created &&
       INVALID_HANDLE_VALUE != file) {
     *created = (ERROR_ALREADY_EXISTS != GetLastError());
   }
 
   return file;
 }
 
+PlatformFile CreatePlatformFile(const std::wstring& name, int flags,
+                                bool* created) {
+  return CreatePlatformFile(FilePath::FromWStringHack(name), flags, created);
+}
+
 bool ClosePlatformFile(PlatformFile file) {
   return (CloseHandle(file) == 0);
 }
 
 }  // namespace disk_cache