[Refactor] to rename and re-layer the file_util stack layers.

webkit/fileapi/quota_file_util.cc

 // Copyright (c) 2011 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/fileapi/quota_file_util.h"
 
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "webkit/fileapi/file_system_context.h"
 #include "webkit/fileapi/file_system_operation_context.h"
 #include "webkit/fileapi/file_system_path_manager.h"
 #include "webkit/fileapi/file_system_quota_util.h"
+#include "webkit/fileapi/native_file_util.h"
 #include "webkit/quota/quota_manager.h"
 
 using quota::QuotaManagerProxy;
 
 namespace fileapi {
 
 const int64 QuotaFileUtil::kNoLimit = kint64max;
 
 // See the comment in the header file as for these constants.
 const int64 QuotaFileUtil::kFilePathCostPerChar = 2;
@@ skipping 40 matching lines @@
   FileSystemOperationContext* operation_context_;
   FileSystemQuotaUtil* quota_util_;
   QuotaManagerProxy* quota_manager_proxy_;
   const GURL& origin_url_;
   FileSystemType type_;
   DISALLOW_COPY_AND_ASSIGN(ScopedOriginUpdateHelper);
 };
 
 }  // namespace (anonymous)
 
-QuotaFileUtil::QuotaFileUtil(FileSystemFileUtil* underlying_file_util)
-    : underlying_file_util_(underlying_file_util) {
+QuotaFileUtil::QuotaFileUtil(FileUtil* underlying_file_util)
+    : OverlayFileUtil(underlying_file_util) {
 }
 
 QuotaFileUtil::~QuotaFileUtil() {
 }
 
 // static
 QuotaFileUtil* QuotaFileUtil::CreateDefault() {
-  return new QuotaFileUtil(new FileSystemFileUtil());
+  return new QuotaFileUtil(new NativeFileUtil());
 }
 
 int64 QuotaFileUtil::ComputeFilePathCost(const FilePath& file_path) const {
   return kFilePathCostPerFile +
       file_path.BaseName().value().length() * kFilePathCostPerChar;
 }
 
 PlatformFileError QuotaFileUtil::CreateOrOpen(
     FileSystemOperationContext* fs_context,
     const FilePath& file_path, int file_flags,
@@ skipping 69 matching lines @@
   scoped_ptr<ScopedOriginUpdateHelper> helper;
 
   int64 allowed_bytes_growth = fs_context->allowed_bytes_growth();
   int64 growth = 0;
 
   if (!exclusive || !file_util::PathExists(file_path)) {
     if (recursive) {
       FilePath last_path;
       for (FilePath path = fs_context->src_virtual_path();
            path.value() != last_path.value() &&
-               !fs_context->src_file_system_file_util()->PathExists(
+               !fs_context->src_file_util()->PathExists(
                    fs_context, fs_context->src_virtual_path());
            path = path.DirName()) {
         growth += ComputeFilePathCost(fs_context->src_virtual_path());
         last_path = path;
       }
     } else {
       growth += ComputeFilePathCost(fs_context->src_virtual_path());
     }
   }
 
@@ skipping 164 matching lines @@
   }
   *growth = src_file_info.size - dest_file_info.size + dest_file_path_cost;
   if (allowed_bytes_growth != QuotaFileUtil::kNoLimit &&
       *growth > allowed_bytes_growth)
     return false;
 
   return true;
 }
 
 }  // namespace fileapi