drive: Move FileSystem::LoadDirectoryIfNeeded to ChangeListLoader

chrome/browser/chromeos/drive/file_system.h

Index: chrome/browser/chromeos/drive/file_system.h
diff --git a/chrome/browser/chromeos/drive/file_system.h b/chrome/browser/chromeos/drive/file_system.h
index 0f47b699567905d2ddd3a572f556045c7e312e75..ee2dd6bafbc2b83d17fdd3dbbde3fea188467dc1 100644
--- a/chrome/browser/chromeos/drive/file_system.h
+++ b/chrome/browser/chromeos/drive/file_system.h
@@ -175,10 +175,6 @@ class FileSystem : public FileSystemInterface,
   internal::SyncClient* sync_client_for_testing() { return sync_client_.get(); }
 
  private:
-  // Part of Reload(). This is called after the cache and the resource metadata
-  // is cleared, and triggers full feed fetching.
-  void ReloadAfterReset(const FileOperationCallback& callback, FileError error);
-
   // Used for initialization and Reload(). (Re-)initializes sub components that
   // need to be recreated during the reload of resource metadata and the cache.
   void ResetComponents();
@@ -220,16 +216,6 @@ class FileSystem : public FileSystemInterface,
                                  const GetResourceEntryCallback& callback,
                                  FileError error);
 
-  // Loads the entry info of the children of |directory_path| to resource
-  // metadata. |callback| must not be null.
-  void LoadDirectoryIfNeeded(const base::FilePath& directory_path,
-                             const FileOperationCallback& callback);
-  void LoadDirectoryIfNeededAfterGetEntry(
-      const base::FilePath& directory_path,
-      const FileOperationCallback& callback,
-      FileError error,
-      scoped_ptr<ResourceEntry> entry);
-
   // Part of ReadDirectory()
   // 1) Called when LoadDirectoryIfNeeded() is complete.
   // 2) Called when ResourceMetadata::ReadDirectory() is complete.