Move PathIsWritable, DirectoryExists, ContentsEqual, and TextContentsEqual to the base namespace.

content/browser/download/download_browsertest.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.
 
 // This file contains download browser tests that are known to be runnable
 // in a pure content context.  Over time tests should be migrated here.
 
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
@@ skipping 757 matching lines @@
   // Verify that the files have the expected data and size.
   // |file1| should be full of '*'s, and |file2| should be the same as the
   // source file.
   base::FilePath file1(download1->GetTargetFilePath());
   size_t file_size1 = URLRequestSlowDownloadJob::kFirstDownloadSize +
                       URLRequestSlowDownloadJob::kSecondDownloadSize;
   std::string expected_contents(file_size1, '*');
   ASSERT_TRUE(VerifyFile(file1, expected_contents, file_size1));
 
   base::FilePath file2(download2->GetTargetFilePath());
-  ASSERT_TRUE(file_util::ContentsEqual(
+  ASSERT_TRUE(base::ContentsEqual(
       file2, GetTestFilePath("download", "download-test.lib")));
 }
 
 // Try to cancel just before we release the download file, by delaying final
 // rename callback.
 IN_PROC_BROWSER_TEST_F(DownloadContentTest, CancelAtFinalRename) {
   // Setup new factory.
   DownloadFileWithDelayFactory* file_factory =
       new DownloadFileWithDelayFactory();
   DownloadManagerImpl* download_manager(DownloadManagerForShell(shell()));
@@ skipping 778 matching lines @@
   // Start the second download and wait until it's done. The test server is
   // single threaded. The response to this download request should follow the
   // response to the previous resumption request.
   GURL url2(test_server()->GetURL("rangereset?size=100&rst_limit=0&token=x"));
   DownloadAndWait(shell(), url2, DownloadItem::COMPLETE);
 
   EXPECT_TRUE(EnsureNoPendingDownloads());
 }
 
 }  // namespace content