clang/win: Let remaining chromium_code targets build with -Wextra.

chrome/common/importer/firefox_importer_utils_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 "chrome/common/importer/firefox_importer_utils.h"
 
 #include <shlobj.h>
 
 #include "base/files/file_util.h"
 #include "base/path_service.h"
@@ skipping 14 matching lines @@
 static const wchar_t* kFirefoxPath = L"Software\\Mozilla\\Mozilla Firefox";
 static const wchar_t* kCurrentVersion = L"CurrentVersion";
 
 int GetCurrentFirefoxMajorVersionFromRegistry() {
   TCHAR ver_buffer[128];
   DWORD ver_buffer_length = sizeof(ver_buffer);
   int highest_version = 0;
   // When installing Firefox with admin account, the product keys will be
   // written under HKLM\Mozilla. Otherwise it the keys will be written under
   // HKCU\Mozilla.
-  for (int i = 0; i < arraysize(kFireFoxRegistryPaths); ++i) {
-    base::win::RegKey reg_key(kFireFoxRegistryPaths[i], kFirefoxPath,
-                              KEY_READ);
+  for (const HKEY kFireFoxRegistryPath : kFireFoxRegistryPaths) {
+    base::win::RegKey reg_key(kFireFoxRegistryPath, kFirefoxPath, KEY_READ);
 
     LONG result = reg_key.ReadValue(kCurrentVersion, ver_buffer,
                                     &ver_buffer_length, NULL);
     if (result != ERROR_SUCCESS)
       continue;
     highest_version = std::max(highest_version, _wtoi(ver_buffer));
   }
   return highest_version;
 }
 
@@ skipping 25 matching lines @@
   // under the "Application Data" folder in Windows XP, Vista, and 7.
   if (!PathService::Get(base::DIR_APP_DATA, &ini_file))
     return base::FilePath();
 
   ini_file = ini_file.AppendASCII("Mozilla");
   ini_file = ini_file.AppendASCII("Firefox");
   ini_file = ini_file.AppendASCII("profiles.ini");
 
   return base::PathExists(ini_file) ? ini_file : base::FilePath();
 }