Regkey functions return error code instead of bool

net/base/platform_mime_util_win.cc

 // Copyright (c) 2010 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/utf_string_conversions.h"
 #include "base/win/registry.h"
@@ skipping 10 matching lines @@
   if (!value.empty()) {
     *result = WideToUTF8(value);
     return true;
   }
   return false;
 }
 
 bool PlatformMimeUtil::GetPreferredExtensionForMimeType(
     const std::string& mime_type, FilePath::StringType* ext) const {
   std::wstring key(L"MIME\\Database\\Content Type\\" + UTF8ToWide(mime_type));
-  if (!base::win::RegKey(HKEY_CLASSES_ROOT, key.c_str(), KEY_READ).ReadValue(
-          L"Extension", ext)) {
+  if (base::win::RegKey(HKEY_CLASSES_ROOT, key.c_str(), KEY_READ).ReadValue(
+          L"Extension", ext) != ERROR_SUCCESS) {
     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