Use FilePath::Extension instead of the deprecated file_util::GetFileExtensionFromPath.

chrome/test/mini_installer_test/mini_installer_test_util.cc

Index: chrome/test/mini_installer_test/mini_installer_test_util.cc
diff --git a/chrome/test/mini_installer_test/mini_installer_test_util.cc b/chrome/test/mini_installer_test/mini_installer_test_util.cc
index 7c0dddd7a24049b933797001a4607a8ba869ca55..2df756f7be2e6c518a395cf34974aa97b7b39ccb 100644
--- a/chrome/test/mini_installer_test/mini_installer_test_util.cc
+++ b/chrome/test/mini_installer_test/mini_installer_test_util.cc
@@ -1,9 +1,10 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 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/test/mini_installer_test/mini_installer_test_util.h"
 
+#include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/path_service.h"
 #include "base/process_util.h"
@@ -145,8 +146,8 @@ bool MiniInstallerTestUtil::GetLatestFile(const wchar_t* file_name,
     std::wstring search_path = find_file_data.cFileName;
     size_t position_found = search_path.find(pattern);
     if (position_found != -1) {
-      std::wstring extension = file_util::GetFileExtensionFromPath(file_name);
-      if ((base::strcasecmp(WideToUTF8(extension).c_str(), "exe")) == 0) {
+      std::wstring extension = FilePath(file_name).Extension();
+      if ((base::strcasecmp(WideToUTF8(extension).c_str(), ".exe")) == 0) {
         file_details->push_back(FileInfo(find_file_data.cFileName, 0));
         return_val = true;
         break;