win: string_util.h -> utf_string_conversions.h fix.

net/base/platform_mime_util_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 <string>
 
 #include "net/base/platform_mime_util.h"
 
 #include "base/registry.h"
-#include "base/string_util.h"
+#include "base/utf_string_conversions.h"
 
 namespace net {
 
 bool PlatformMimeUtil::GetPlatformMimeTypeFromExtension(
     const FilePath::StringType& ext, std::string* result) const {
   // check windows registry for file extension's mime type (registry key
   // names are not case-sensitive).
   std::wstring value, key = L"." + ext;
   RegKey(HKEY_CLASSES_ROOT, key.c_str()).ReadValue(L"Content Type", &value);
   if (!value.empty()) {
@@ skipping 10 matching lines @@
     return false;
 
   // Strip off the leading dot, this should always be the case.
   if (!ext->empty() && ext->at(0) == L'.')
     ext->erase(ext->begin());
 
   return true;
 }
 
 }  // namespace net