Move WriteFile and WriteFileDescriptor from file_util to base namespace.

chrome/browser/media_galleries/media_folder_finder_unittest.cc

 // Copyright 2014 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/browser/media_galleries/media_folder_finder.h"
 
 #include <set>
 #include <string>
 
 #include "base/base_paths.h"
@@ skipping 113 matching lines @@
       if (uniquifier > 0) {
         test_file = test_file.InsertBeforeExtensionASCII(
             base::StringPrintf(" (%d)", uniquifier));
         filesize += uniquifier;
       }
 
       std::string dummy_data;
       dummy_data.resize(filesize);
 
       int bytes_written =
-          file_util::WriteFile(test_file, dummy_data.c_str(), filesize);
+          base::WriteFile(test_file, dummy_data.c_str(), filesize);
       ASSERT_GE(bytes_written, 0);
       ASSERT_EQ(filesize, static_cast<size_t>(bytes_written));
     }
   }
 
   void RunLoop() {
     base::RunLoop().RunUntilIdle();
     content::BrowserThread::GetBlockingPool()->FlushForTesting();
   }
 
@@ skipping 258 matching lines @@
 
   // |fake_home_dir| and its ancestors do not show up in results.
   expected_results.erase(fake_dir());
   expected_results.erase(fake_home_dir);
 
   CreateMediaFolderFinder(folders, true, expected_results);
   StartScan();
   RunLoopUntilReceivedCallback();
   DeleteMediaFolderFinder();
 }