[SyncFileSystem][Clean up] Delete DriveMetadataDB::DeleteEntry.

chrome/browser/sync_file_system/drive_metadata_store.h

 // 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.
 
 #ifndef CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_METADATA_STORE_H_
 #define CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_METADATA_STORE_H_
 
 #include <map>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/callback_forward.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/threading/non_thread_safe.h"
 #include "webkit/browser/fileapi/file_system_url.h"
 #include "webkit/browser/fileapi/syncable/sync_callbacks.h"
 #include "webkit/browser/fileapi/syncable/sync_status_code.h"
 
 namespace base {
 class SequencedTaskRunner;
 }
 
 namespace leveldb {
 class DB;
+class WriteBatch;
 }
 
 class GURL;
 
 namespace sync_file_system {
 
 class DriveMetadata;
 class DriveMetadataDB;
 struct DriveMetadataDBContents;
 
@@ skipping 103 matching lines @@
 
   // Maps |resource_id| to corresponding |origin|.
   // Returns true if the directory indicated by |resource_id| is not an origin
   // root directory.
   bool GetOriginByOriginRootDirectoryId(const std::string& resource_id,
                                         GURL* origin);
 
  private:
   friend class DriveMetadataStoreTest;
 
+  void WriteToDB(scoped_ptr<leveldb::WriteBatch> batch,
+                 const SyncStatusCallback& callback);
+
   void UpdateDBStatus(SyncStatusCode status);
   void UpdateDBStatusAndInvokeCallback(const SyncStatusCallback& callback,
                                        SyncStatusCode status);
   void DidInitialize(const InitializationCallback& callback,
                      DriveMetadataDBContents* contents,
                      SyncStatusCode error);
   void DidUpdateOrigin(const SyncStatusCallback& callback,
                        SyncStatusCode status);
 
   // These are only for testing.
@@ skipping 20 matching lines @@
   ResourceIdByOrigin disabled_origins_;
 
   OriginByResourceId origin_by_resource_id_;
 
   DISALLOW_COPY_AND_ASSIGN(DriveMetadataStore);
 };
 
 }  // namespace sync_file_system
 
 #endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_METADATA_STORE_H_