Deprecate NonThreadSafe in components/sync in favor of SequenceChecker.

components/sync/engine_impl/js_mutation_event_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 "components/sync/engine_impl/js_mutation_event_observer.h"
 
 #include <stddef.h>
 
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/values.h"
 #include "components/sync/js/js_event_details.h"
 #include "components/sync/js/js_event_handler.h"
 
 namespace syncer {
 
 JsMutationEventObserver::JsMutationEventObserver() : weak_ptr_factory_(this) {}
 
 JsMutationEventObserver::~JsMutationEventObserver() {
-  DCHECK(CalledOnValidThread());
+  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
 }
 
 base::WeakPtr<JsMutationEventObserver> JsMutationEventObserver::AsWeakPtr() {
   return weak_ptr_factory_.GetWeakPtr();
 }
 
 void JsMutationEventObserver::InvalidateWeakPtrs() {
   weak_ptr_factory_.InvalidateWeakPtrs();
 }
 
@@ skipping 43 matching lines @@
     return;
   }
   base::DictionaryValue details;
   details.SetString("modelType", ModelTypeToString(model_type));
   HandleJsEvent(FROM_HERE, "onChangesComplete", JsEventDetails(&details));
 }
 
 void JsMutationEventObserver::OnTransactionWrite(
     const syncable::ImmutableWriteTransactionInfo& write_transaction_info,
     ModelTypeSet models_with_changes) {
-  DCHECK(CalledOnValidThread());
+  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
   if (!event_handler_.IsInitialized()) {
     return;
   }
   base::DictionaryValue details;
   details.Set("writeTransactionInfo",
               write_transaction_info.Get().ToValue(kChangeLimit));
   details.Set("modelsWithChanges", ModelTypeSetToValue(models_with_changes));
   HandleJsEvent(FROM_HERE, "onTransactionWrite", JsEventDetails(&details));
 }
 
 void JsMutationEventObserver::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