sync: Remove dead code related to ClearUserData

sync/internal_api/js_sync_manager_observer.cc

 // 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.
 
 #include "sync/internal_api/js_sync_manager_observer.h"
 
 #include <cstddef>
 
 #include "base/location.h"
 #include "base/logging.h"
@@ skipping 60 matching lines @@
   // JSON anyway.
 
   base::DictionaryValue details;
   details.Set("restoredTypes", ModelTypeSetToValue(restored_types));
 
   HandleJsEvent(FROM_HERE,
                 "onInitializationComplete",
                 JsEventDetails(&details));
 }
 
-void JsSyncManagerObserver::OnStopSyncingPermanently() {
-  if (!event_handler_.IsInitialized()) {
-    return;
-  }
-  HandleJsEvent(FROM_HERE, "onStopSyncingPermanently", JsEventDetails());
-}
-
 void JsSyncManagerObserver::HandleJsEvent(
     const tracked_objects::Location& from_here,
     const std::string& name, const JsEventDetails& details) {
   if (!event_handler_.IsInitialized()) {
     NOTREACHED();
     return;
   }
   event_handler_.Call(from_here,
                       &JsEventHandler::HandleJsEvent, name, details);
 }
 
 }  // namespace syncer