Extend and refactor GDataFileBase and derived classes.

chrome/browser/chromeos/gdata/gdata_file_system.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 "chrome/browser/chromeos/gdata/gdata_file_system.h"
 
 #include <errno.h>
 
 #include "base/bind.h"
 #include "base/file_util.h"
@@ skipping 855 matching lines @@
 
   {  // Lock to use GetGDataFileInfoFromPath and returned pointer, but need to
      // release before GetFromCache.
     base::AutoLock lock(lock_);
     GDataFileBase* file_base = GetGDataFileInfoFromPath(gdata_file_path);
 
     if (!file_base || !file_base->AsGDataFile())
       return cache_file_path;
 
     GDataFile* file = file_base->AsGDataFile();
-    resource = file->resource();
+    resource = file->resource_id();
     md5 = file->file_md5();
   }
 
   if (!GetFromCache(resource, md5, &cache_file_path))
     cache_file_path.clear();
 
   return cache_file_path;
 }
 
 void GDataFileSystem::OnCreateDirectoryCompleted(
@@ skipping 187 matching lines @@
       new ReadOnlyFindFileDelegate());
   UnsafeFindFileByPath(file_path, update_delegate);
 
   GDataFileBase* file = update_delegate->file();
 
   if (!file)
     return base::PLATFORM_FILE_ERROR_NOT_FOUND;
 
   // If it's a file (only files have resource), remove it from cache.
   if (file->AsGDataFile()) {
-    RemoveFromCache(file->AsGDataFile()->resource(),
+    RemoveFromCache(file->AsGDataFile()->resource_id(),
                     base::Bind(&GDataFileSystem::OnRemovedFromCache,
                                weak_ptr_factory_.GetWeakPtr()));
   }
 
   // You can't remove root element.
   if (!file->parent())
     return base::PLATFORM_FILE_ERROR_ACCESS_DENIED;
 
   if (!file->parent()->RemoveFile(file))
     return base::PLATFORM_FILE_ERROR_NOT_FOUND;
@@ skipping 403 matching lines @@
 
 GDataFileSystemFactory::~GDataFileSystemFactory() {
 }
 
 ProfileKeyedService* GDataFileSystemFactory::BuildServiceInstanceFor(
     Profile* profile) const {
   return new GDataFileSystem(profile, new DocumentsService);
 }
 
 }  // namespace gdata