Fix for finding a disabled origin after it was already moved to enabled.

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 <string>
 
 #include "base/basictypes.h"
@@ skipping 82 matching lines @@
 
   // Unregisters |origin| to track remote side changes for the |origin|.
   // Upon completion, invokes |callback|.
   // The caller may call this method again when the remote service state
   // migrates to REMOTE_SERVICE_OK state if the error code returned via
   // |callback| was retriable ones.
   virtual void UnregisterOriginForTrackingChanges(
       const GURL& origin,
       const SyncStatusCallback& callback) = 0;
 
+  // Re-enables |origin| that was previously disabled. If |origin| is not a
+  // SyncFS app, then the origin is effectively ignored.
   virtual void EnableOriginForTrackingChanges(
       const GURL& origin,
       const SyncStatusCallback& callback) = 0;
 
   virtual void DisableOriginForTrackingChanges(
       const GURL& origin,
       const SyncStatusCallback& callback) = 0;
 
   // Uninstalls the |origin| by deleting its remote data copy and then removing
   // the origin from the metadata store.
@@ skipping 43 matching lines @@
   // Gets the conflict resolution policy.
   virtual ConflictResolutionPolicy GetConflictResolutionPolicy() const = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(RemoteFileSyncService);
 };
 
 }  // namespace sync_file_system
 
 #endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_REMOTE_FILE_SYNC_SERVICE_H_