[SyncFS] Replace leveldb classes with LevelDBWrapper

chrome/browser/sync_file_system/drive_backend/metadata_database.h

Index: chrome/browser/sync_file_system/drive_backend/metadata_database.h
diff --git a/chrome/browser/sync_file_system/drive_backend/metadata_database.h b/chrome/browser/sync_file_system/drive_backend/metadata_database.h
index 327cf190a1b2f8161e6dd6e495e4b4b5ea9f73e1..e88b0f0133874f8ee0d0fe7fe917ee81737fe923 100644
--- a/chrome/browser/sync_file_system/drive_backend/metadata_database.h
+++ b/chrome/browser/sync_file_system/drive_backend/metadata_database.h
@@ -29,9 +29,7 @@ class SingleThreadTaskRunner;
 }
 
 namespace leveldb {
-class DB;
 class Env;
-class WriteBatch;
 }
 
 namespace google_apis {
@@ -50,6 +48,7 @@ namespace drive_backend {
 class FileDetails;
 class FileMetadata;
 class FileTracker;
+class LevelDBWrapper;
 class MetadataDatabaseIndexInterface;
 class ServiceMetadata;
 
@@ -139,7 +138,7 @@ class MetadataDatabase {
                      leveldb::Env* env_override,
                      const CreateCallback& callback);
   static SyncStatusCode CreateForTesting(
-      scoped_ptr<leveldb::DB> db,
+      scoped_ptr<LevelDBWrapper> db,
       scoped_ptr<MetadataDatabase>* metadata_database_out);
 
   ~MetadataDatabase();
@@ -360,27 +359,22 @@ class MetadataDatabase {
 
   // Database manipulation methods.
   void RegisterTrackerAsAppRoot(const std::string& app_id,
-                                int64 tracker_id,
-                                leveldb::WriteBatch* batch);
+                                int64 tracker_id);
 
   void CreateTrackerForParentAndFileID(const FileTracker& parent_tracker,
-                                       const std::string& file_id,
-                                       leveldb::WriteBatch* batch);
+                                       const std::string& file_id);
   void CreateTrackerForParentAndFileMetadata(const FileTracker& parent_tracker,
                                              const FileMetadata& file_metadata,
-                                             UpdateOption option,
-                                             leveldb::WriteBatch* batch);
+                                             UpdateOption option);
   void CreateTrackerInternal(const FileTracker& parent_tracker,
                              const std::string& file_id,
                              const FileDetails* details,
-                             UpdateOption option,
-                             leveldb::WriteBatch* batch);
+                             UpdateOption option);
 
   void MaybeAddTrackersForNewFile(const FileMetadata& file,
-                                  UpdateOption option,
-                                  leveldb::WriteBatch* batch);
+                                  UpdateOption option);
 
-  int64 IncrementTrackerID(leveldb::WriteBatch* batch);
+  int64 IncrementTrackerID();
 
   bool CanActivateTracker(const FileTracker& tracker);
   bool ShouldKeepDirty(const FileTracker& tracker) const;
@@ -390,30 +384,24 @@ class MetadataDatabase {
   bool HasActiveTrackerForPath(int64 parent_tracker,
                                const std::string& title) const;
 
-  void RemoveUnneededTrackersForMissingFile(const std::string& file_id,
-                                            leveldb::WriteBatch* batch);
+  void RemoveUnneededTrackersForMissingFile(const std::string& file_id);
   void UpdateByFileMetadata(const tracked_objects::Location& from_where,
                             scoped_ptr<FileMetadata> file,
-                            UpdateOption option,
-                            leveldb::WriteBatch* batch);
+                            UpdateOption option);
 
-  void WriteToDatabase(scoped_ptr<leveldb::WriteBatch> batch,
-                       const SyncStatusCallback& callback);
+  void WriteToDatabase(const SyncStatusCallback& callback);
 
   bool HasNewerFileMetadata(const std::string& file_id, int64 change_id);
 
   scoped_ptr<base::ListValue> DumpTrackers();
   scoped_ptr<base::ListValue> DumpMetadata();
 
-  void AttachSyncRoot(const google_apis::FileResource& sync_root_folder,
-                      leveldb::WriteBatch* batch);
-  void AttachInitialAppRoot(const google_apis::FileResource& app_root_folder,
-                            leveldb::WriteBatch* batch);
+  void AttachSyncRoot(const google_apis::FileResource& sync_root_folder);
+  void AttachInitialAppRoot(const google_apis::FileResource& app_root_folder);
 
   void ForceActivateTrackerByPath(int64 parent_tracker_id,
                                   const std::string& title,
-                                  const std::string& file_id,
-                                  leveldb::WriteBatch* batch);
+                                  const std::string& file_id);
 
   void DetachFromSequence();
 
@@ -421,7 +409,7 @@ class MetadataDatabase {
   scoped_refptr<base::SequencedTaskRunner> file_task_runner_;
   base::FilePath database_path_;
   leveldb::Env* env_override_;
-  scoped_ptr<leveldb::DB> db_;
+  scoped_ptr<LevelDBWrapper> db_;
 
   int64 largest_known_change_id_;