drive: Remove the remaining mentions of "feed"

chrome/browser/chromeos/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_FILE_SYSTEM_H_
 #define CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 235 matching lines @@
   void CloseFileFinalize(const base::FilePath& file_path,
                          const FileOperationCallback& callback,
                          FileError result);
 
   // Callback for handling about resource fetch.
   void OnGetAboutResource(
       const GetAvailableSpaceCallback& callback,
       google_apis::GDataErrorCode status,
       scoped_ptr<google_apis::AboutResource> about_resource);
 
-  // Callback for handling results of ReloadFeedFromServerIfNeeded() initiated
-  // from CheckForUpdates().
+  // Part of CheckForUpdates(). Called when
+  // ChangeListLoader::CheckForUpdates() is complete.
   void OnUpdateChecked(FileError error);
 
   // Changes state of hosted documents visibility, triggers directory refresh.
   void SetHideHostedDocuments(bool hide);
 
   // Initializes preference change observer.
   void InitializePreferenceObserver();
 
   // Part of GetResourceEntryByPath()
   // 1) Called when ResourceMetadata::GetResourceEntryByPath() is complete.
@@ skipping 129 matching lines @@
   // Note: This should remain the last member so it'll be destroyed and
   // invalidate the weak pointers before any other members are destroyed.
   base::WeakPtrFactory<FileSystem> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(FileSystem);
 };
 
 }  // namespace drive
 
 #endif  // CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_H_