Implement SyncFileSystemService::GetFileSyncStatus method

webkit/fileapi/syncable/local_file_sync_context.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 WEBKIT_FILEAPI_SYNCABLE_LOCAL_FILE_SYNC_CONTEXT_H_
 #define WEBKIT_FILEAPI_SYNCABLE_LOCAL_FILE_SYNC_CONTEXT_H_
 
 #include <deque>
 #include <map>
 #include <set>
@@ skipping 33 matching lines @@
 // An instance of this class is shared by FileSystemContexts and outlives
 // LocalFileSyncService.
 class WEBKIT_STORAGE_EXPORT LocalFileSyncContext
     : public base::RefCountedThreadSafe<LocalFileSyncContext>,
       public LocalFileSyncStatus::Observer {
  public:
   typedef base::Callback<void(SyncStatusCode status,
                               const LocalFileSyncInfo& sync_file_info)>
       LocalFileSyncInfoCallback;
 
+  typedef base::Callback<void(bool has_pending_changes)>
+      HasPendingLocalChangeCallback;
+
   LocalFileSyncContext(base::SingleThreadTaskRunner* ui_task_runner,
                        base::SingleThreadTaskRunner* io_task_runner);
 
   // Initializes |file_system_context| for syncable file operations for
   // |service_name| and registers the it into the internal map.
   // Calling this multiple times for the same file_system_context is valid.
   // This method must be called on UI thread.
   void MaybeInitializeFileSystemContext(const GURL& source_url,
                                         const std::string& service_name,
                                         FileSystemContext* file_system_context,
@@ skipping 45 matching lines @@
       const FilePath& local_path,
       const FileSystemURL& url,
       const SyncStatusCallback& callback);
 
   // This must be called on UI thread.
   void GetFileMetadata(
       FileSystemContext* file_system_context,
       const FileSystemURL& url,
       const SyncFileMetadataCallback& callback);
 
+  // Returns true via |callback| if the given file |url| has local pending
+  // changes.
+  void HasPendingLocalChanges(
+      FileSystemContext* file_system_context,
+      const FileSystemURL& url,
+      const HasPendingLocalChangeCallback& callback);
+
   // They must be called on UI thread.
   void AddOriginChangeObserver(LocalOriginChangeObserver* observer);
   void RemoveOriginChangeObserver(LocalOriginChangeObserver* observer);
 
   // OperationRunner is accessible only on IO thread.
   base::WeakPtr<SyncableFileOperationRunner> operation_runner() const;
 
   // SyncContext is accessible only on IO thread.
   LocalFileSyncStatus* sync_status() const;
 
@@ skipping 121 matching lines @@
   ObserverList<LocalOriginChangeObserver> origin_change_observers_;
 
   int mock_notify_changes_duration_in_sec_;
 
   DISALLOW_COPY_AND_ASSIGN(LocalFileSyncContext);
 };
 
 }  // namespace fileapi
 
 #endif  // WEBKIT_FILEAPI_SYNCABLE_LOCAL_FILE_SYNC_CONTEXT_H_