Add some DVLOG's in MetadataDatabase::Update* methods

chrome/browser/sync_file_system/drive_backend/metadata_database.h

 // Copyright 2013 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_BACKEND_METADATA_DATABASE_H_
 #define CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_METADATA_DATABASE_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 213 matching lines @@
 
   // Returns false if no registered app exists associated to |app_id|.
   // If |full_path| is active, assigns the tracker of |full_path| to |tracker|.
   // Otherwise, assigns the nearest active ancestor to |full_path| to |tracker|.
   // Also, assigns the full path of |tracker| to |path|.
   bool FindNearestActiveAncestor(const std::string& app_id,
                                  const base::FilePath& full_path,
                                  FileTracker* tracker,
                                  base::FilePath* path) const;
 
-  void UpdateByFileMetadata(scoped_ptr<FileMetadata> file,
-                            leveldb::WriteBatch* batch);
-
   // Updates database by |changes|.
   // Marks each tracker for modified file as dirty and adds new trackers if
   // needed.
   void UpdateByChangeList(int64 largest_change_id,
                           ScopedVector<google_apis::ChangeResource> changes,
                           const SyncStatusCallback& callback);
 
   // Updates database by |resource|.
   // Marks each tracker for modified file as dirty and adds new trackers if
   // needed.
@@ skipping 131 matching lines @@
   void RecursiveMarkTrackerAsDirty(int64 root_tracker_id,
                                    leveldb::WriteBatch* batch);
   bool CanActivateTracker(const FileTracker& tracker);
   bool ShouldKeepDirty(const FileTracker& tracker) const;
 
   bool HasDisabledAppRoot(const FileTracker& tracker) const;
   bool HasActiveTrackerForFileID(const std::string& file_id) const;
   bool HasActiveTrackerForPath(int64 parent_tracker,
                                const std::string& title) const;
 
+  void UpdateByFileMetadata(const tracked_objects::Location& from_where,
+                            scoped_ptr<FileMetadata> file,
+                            leveldb::WriteBatch* batch);
+
   void WriteToDatabase(scoped_ptr<leveldb::WriteBatch> batch,
                        const SyncStatusCallback& callback);
 
   bool HasNewerFileMetadata(const std::string& file_id, int64 change_id);
 
   scoped_refptr<base::SequencedTaskRunner> task_runner_;
   scoped_ptr<leveldb::DB> db_;
 
   scoped_ptr<ServiceMetadata> service_metadata_;
   int64 largest_known_change_id_;
@@ skipping 25 matching lines @@
 
   base::WeakPtrFactory<MetadataDatabase> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MetadataDatabase);
 };
 
 }  // namespace drive_backend
 }  // namespace sync_file_system
 
 #endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_METADATA_DATABASE_H_