Update the number of fetched files more frequently.

chrome/browser/chromeos/gdata/gdata_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_GDATA_GDATA_FILE_SYSTEM_H_
 #define CHROME_BROWSER_CHROMEOS_GDATA_GDATA_FILE_SYSTEM_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 17 matching lines @@
 class SequencedTaskRunner;
 
 }  // namespace base
 
 namespace gdata {
 
 class DocumentsServiceInterface;
 class DriveWebAppsRegistryInterface;
 class GDataWapiFeedLoader;
 struct GetDocumentsParams;
+struct GetDocumentsUiState;
 struct UploadFileInfo;
 
 namespace {
 struct LoadRootFeedParams;
 }  // namespace
 
 // Callback run as a response to LoadFromServer.
 //
 // TODO(satorux): Move this to a new file: crbug.com/138268
 typedef base::Callback<void(GetDocumentsParams* params,
@@ skipping 116 matching lines @@
   // Callback for handling response from |GDataDocumentsService::GetDocuments|.
   // Invokes |callback| when done.
   void OnGetDocuments(
       ContentOrigin initial_origin,
       const LoadDocumentFeedCallback& callback,
       GetDocumentsParams* params,
       base::TimeTicks start_time,
       GDataErrorCode status,
       scoped_ptr<base::Value> data);
 
+  // Callback for handling UI updates caused by document fetching.
+  void OnNotifyDocumentFeedFetched(
+      base::WeakPtr<GetDocumentsUiState> ui_state);
+
   // Save filesystem as proto file.
   void SaveFileSystemAsProto();
 
   GDataDirectoryService* directory_service_;  // Not owned.
   DocumentsServiceInterface* documents_service_;  // Not owned.
   DriveWebAppsRegistryInterface* webapps_registry_;  // Not owned.
   GDataCache* cache_;  // Not owned.
   scoped_refptr<base::SequencedTaskRunner> blocking_task_runner_;
   ObserverList<Observer> observers_;
 
@@ skipping 779 matching lines @@
   // invalidate the weak pointers before any other members are destroyed.
   base::WeakPtrFactory<GDataFileSystem> 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<GDataFileSystem> ui_weak_ptr_;
 };
 
 }  // namespace gdata
 
 #endif  // CHROME_BROWSER_CHROMEOS_GDATA_GDATA_FILE_SYSTEM_H_