Move some more file utils to the base namespace.

chrome/installer/util/shell_util.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 defines functions that integrate Chrome in Windows shell. These
 // functions can be used by Chrome as well as Chrome installer. All of the
 // work is done by the local functions defined in anonymous namespace in
 // this class.
 
 #include "chrome/installer/util/shell_util.h"
@@ skipping 1310 matching lines @@
       location != ShellUtil::SHORTCUT_LOCATION_APP_SHORTCUTS) {
     NOTREACHED();
     return false;
   }
 
   base::FilePath shortcut_folder;
   if (!ShellUtil::GetShortcutPath(location, dist, level, &shortcut_folder)) {
     LOG(WARNING) << "Cannot find path at location " << location;
     return false;
   }
-  if (file_util::IsDirectoryEmpty(shortcut_folder) &&
+  if (base::IsDirectoryEmpty(shortcut_folder) &&
       !base::DeleteFile(shortcut_folder, true)) {
     LOG(ERROR) << "Cannot remove folder " << shortcut_folder.value();
     return false;
   }
   return true;
 }
 
 }  // namespace
 
 const wchar_t* ShellUtil::kRegDefaultIcon = L"\\DefaultIcon";
@@ skipping 812 matching lines @@
     // are any left...).
     if (free_bits >= 8 && next_byte_index < size) {
       free_bits -= 8;
       bit_stream += bytes[next_byte_index++] << free_bits;
     }
   }
 
   DCHECK_EQ(ret.length(), encoded_length);
   return ret;
 }