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

webkit/browser/fileapi/sandbox_file_system_backend.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.
 
 #include "webkit/browser/fileapi/sandbox_file_system_backend.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/logging.h"
@@ skipping 385 matching lines @@
   if (!enable_usage_tracking_)
     return 0;
 
   // Don't use usage cache and return recalculated usage for sticky invalidated
   // origins.
   if (ContainsKey(sticky_dirty_origins_, std::make_pair(origin_url, type)))
     return RecalculateUsage(file_system_context, origin_url, type);
 
   base::FilePath base_path =
       GetBaseDirectoryForOriginAndType(origin_url, type, false);
-  if (base_path.empty() || !file_util::DirectoryExists(base_path))
+  if (base_path.empty() || !base::DirectoryExists(base_path))
     return 0;
   base::FilePath usage_file_path =
       base_path.Append(FileSystemUsageCache::kUsageFileName);
 
   bool is_valid = usage_cache()->IsValid(usage_file_path);
   uint32 dirty_status = 0;
   bool dirty_status_available =
       usage_cache()->GetDirty(usage_file_path, &dirty_status);
   bool visited = !visited_origins_.insert(origin_url).second;
   if (is_valid && (dirty_status == 0 || (dirty_status_available && visited))) {
@@ skipping 240 matching lines @@
 
   while (!(file_path_each = enumerator->Next()).empty()) {
     usage += enumerator->Size();
     usage += ObfuscatedFileUtil::ComputeFilePathCost(file_path_each);
   }
 
   return usage;
 }
 
 }  // namespace fileapi