Get rid of kPathSeparator on windows.

chrome/browser/download/download_uitest.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 <shlwapi.h>
 #include <sstream>
 #include <string>
 
 #include "base/command_line.h"
 #include "base/file_util.h"
@@ skipping 84 matching lines @@
     EXPECT_TRUE(file_util::Delete(file_on_client, false));
   }
 
   void CleanUpDownload(const std::wstring& file) {
     CleanUpDownload(file, file);
   }
 
   virtual void SetUp() {
     UITest::SetUp();
     download_prefix_ = GetDownloadDirectory();
-    download_prefix_ += file_util::kPathSeparator;
+    download_prefix_ += FilePath::kSeparators[0];
   }
 
  protected:
   void RunSizeTest(const wstring& url,
                    const wstring& expected_title_in_progress,
                    const wstring& expected_title_finished) {
     {
       EXPECT_EQ(1, GetTabCount());
 
       NavigateToURL(GURL(url));
@@ skipping 117 matching lines @@
   RunSizeTest(url, L"32.0 KB - " + filename, L"100% - " + filename);
 }
 
 // http://b/1158253
 TEST_F(DownloadTest, DISABLED_KnownSize) {
   std::wstring url(URLRequestSlowDownloadJob::kKnownSizeUrl);
   std::wstring filename = file_util::GetFilenameFromPath(url);
   RunSizeTest(url, L"71% - " + filename, L"100% - " + filename);
 }