drive: Add the local largest changestamp to chrome:drive-internals

chrome/browser/chromeos/drive/drive_file_system.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_CHROMEOS_DRIVE_DRIVE_FILE_SYSTEM_H_
 #define CHROME_BROWSER_CHROMEOS_DRIVE_DRIVE_FILE_SYSTEM_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 117 matching lines @@
                                const FilePath& directory_path,
                                scoped_ptr<gdata::DocumentEntry> doc_entry,
                                const FilePath& file_content_path,
                                DriveCache::FileOperationType cache_operation,
                                const base::Closure& callback) OVERRIDE;
   virtual void UpdateEntryData(const std::string& resource_id,
                                const std::string& md5,
                                scoped_ptr<gdata::DocumentEntry> entry,
                                const FilePath& file_content_path,
                                const base::Closure& callback) OVERRIDE;
+  virtual DriveResourceMetadata* GetResourceMetadata() OVERRIDE {

[Haruki Sato, 2012/10/15 07:10:29]

Is this overriding something?

[satorux1, 2012/10/16 05:02:56]

yes. one in DriveFileSystemInterface

+    return resource_metadata_.get();
+  }
 
   // content::NotificationObserver implementation.
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
   // GDataWapiFeedLoader::Observer overrides.
   // Used to propagate events from GDataWapiFeedLoader.
   virtual void OnDirectoryChanged(const FilePath& directory_path) OVERRIDE;
   virtual void OnDocumentFeedFetched(int num_accumulated_entries) OVERRIDE;
   virtual void OnFeedFromServerLoaded() OVERRIDE;
 
-  DriveResourceMetadata* ResourceMetadata() { return resource_metadata_.get(); }
-
   // Used in tests to load the root feed from the cache.
   void LoadRootFeedFromCacheForTesting();
 
   // Used in tests to update the file system from |feed_list|.
   // See also the comment at GDataWapiFeedLoader::UpdateFromFeed().
   DriveFileError UpdateFromFeedForTesting(
       const ScopedVector<gdata::DocumentFeed>& feed_list,
       int64 start_changestamp,
       int64 root_feed_changestamp);
 
@@ skipping 718 matching lines @@
   // invalidate the weak pointers before any other members are destroyed.
   base::WeakPtrFactory<DriveFileSystem> ui_weak_ptr_factory_;
   // Unlike other classes, we need this as we need this to redirect a task
   // from IO thread to UI thread.
   base::WeakPtr<DriveFileSystem> ui_weak_ptr_;
 };
 
 }  // namespace drive
 
 #endif  // CHROME_BROWSER_CHROMEOS_DRIVE_DRIVE_FILE_SYSTEM_H_