[wrapper-tracing] Enable cleanup and invalidating on WorkerBackingThread

third_party/WebKit/Source/bindings/core/v8/V8Initializer.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 406 matching lines @@
 
   isolate->SetPromiseRejectCallback(promiseRejectHandlerInMainThread);
 
   if (v8::HeapProfiler* profiler = isolate->GetHeapProfiler())
     profiler->SetWrapperClassInfoProvider(
         WrapperTypeInfo::NodeClassId, &RetainedDOMInfo::createRetainedDOMInfo);
 
   ASSERT(ThreadState::mainThreadState());
   ThreadState::mainThreadState()->addInterruptor(
       WTF::makeUnique<V8IsolateInterruptor>(isolate));
-  if (RuntimeEnabledFeatures::traceWrappablesEnabled()) {
-    ThreadState::mainThreadState()->registerTraceDOMWrappers(
-        isolate, V8GCController::traceDOMWrappers,
-        ScriptWrappableVisitor::invalidateDeadObjectsInMarkingDeque,
-        ScriptWrappableVisitor::performCleanup);
-  } else {
-    ThreadState::mainThreadState()->registerTraceDOMWrappers(
-        isolate, V8GCController::traceDOMWrappers, nullptr, nullptr);
-  }
+  ThreadState::mainThreadState()->registerTraceDOMWrappers(
+      isolate, V8GCController::traceDOMWrappers,
+      ScriptWrappableVisitor::invalidateDeadObjectsInMarkingDeque,
+      ScriptWrappableVisitor::performCleanup);
 
   V8PerIsolateData::from(isolate)->setThreadDebugger(
       WTF::makeUnique<MainThreadDebugger>(isolate));
 }
 
 void V8Initializer::shutdownMainThread() {
   ASSERT(isMainThread());
   v8::Isolate* isolate = V8PerIsolateData::mainThreadIsolate();
   V8PerIsolateData::willBeDestroyed(isolate);
   V8PerIsolateData::destroy(isolate);
@@ skipping 75 matching lines @@
           v8::Isolate::kMessageLog);
   isolate->SetFatalErrorHandler(reportFatalErrorInWorker);
 
   uint32_t here;
   isolate->SetStackLimit(reinterpret_cast<uintptr_t>(&here) -
                          kWorkerMaxStackSize);
   isolate->SetPromiseRejectCallback(promiseRejectHandlerInWorker);
 }
 
 }  // namespace blink