[SyncFS] Make GetOriginStatusMap asynchronous

chrome/browser/sync_file_system/remote_file_sync_service.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_SYNC_FILE_SYSTEM_REMOTE_FILE_SYNC_SERVICE_H_
 #define CHROME_BROWSER_SYNC_FILE_SYSTEM_REMOTE_FILE_SYNC_SERVICE_H_
 
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
 #include "chrome/browser/sync_file_system/conflict_resolution_policy.h"
 #include "chrome/browser/sync_file_system/sync_callbacks.h"
 #include "chrome/browser/sync_file_system/sync_file_metadata.h"
 #include "webkit/browser/fileapi/file_system_url.h"
 
 class BrowserContextKeyedServiceFactory;
 class GURL;
 
 namespace base {
 class ListValue;
@@ skipping 80 matching lines @@
     SyncFileMetadata metadata;
   };
 
   enum UninstallFlag {
     UNINSTALL_AND_PURGE_REMOTE,
     UNINSTALL_AND_KEEP_REMOTE,
   };
 
   // For GetOriginStatusMap.
   typedef std::map<GURL, std::string> OriginStatusMap;
+  typedef base::Callback<void(scoped_ptr<OriginStatusMap> status_map)>
+      StatusMapCallback;
 
   // For GetRemoteVersions.
   typedef base::Callback<void(SyncStatusCode status,
                               const std::vector<Version>& versions)>
       RemoteVersionsCallback;
   typedef base::Callback<void(SyncStatusCode status,
                               webkit_blob::ScopedFile downloaded)>
       DownloadVersionCallback;
 
   // For DumpFile.
@@ skipping 58 matching lines @@
   // Returns a LocalChangeProcessor that applies a local change to the remote
   // storage backed by this service.
   virtual LocalChangeProcessor* GetLocalChangeProcessor() = 0;
 
   // Returns the current remote service state (should equal to the value
   // returned by the last OnRemoteServiceStateUpdated notification.
   virtual RemoteServiceState GetCurrentState() const = 0;
 
   // Returns all origins along with an arbitrary string description of their
   // corresponding sync statuses.
-  virtual void GetOriginStatusMap(OriginStatusMap* status_map) = 0;
+  virtual void GetOriginStatusMap(const StatusMapCallback& callback) = 0;
 
   // Returns file metadata for |origin| to call |callback|.
   virtual void DumpFiles(const GURL& origin,
                          const ListCallback& callback) = 0;
 
   // Returns the dump of internal database.
   virtual void DumpDatabase(const ListCallback& callback) = 0;
 
   // Enables or disables the background sync.
   // Setting this to false should disable the synchronization (and make
   // the service state to REMOTE_SERVICE_DISABLED), while setting this to
   // true does not necessarily mean the service is actually turned on
   // (for example if Chrome is offline the service state will become
   // REMOTE_SERVICE_TEMPORARY_UNAVAILABLE).
   virtual void SetSyncEnabled(bool enabled) = 0;
 
   virtual void PromoteDemotedChanges() = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(RemoteFileSyncService);
 };
 
 }  // namespace sync_file_system
 
 #endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_REMOTE_FILE_SYNC_SERVICE_H_