[wrapper-tracing] Support for incrementally tracing ScopedPersistent

third_party/WebKit/Source/core/events/PromiseRejectionEvent.cpp

 // Copyright 2015 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 "core/events/PromiseRejectionEvent.h"
 
 #include "bindings/core/v8/DOMWrapperWorld.h"
 
 namespace blink {
 
 PromiseRejectionEvent::PromiseRejectionEvent(
     ScriptState* state,
     const AtomicString& type,
     const PromiseRejectionEventInit& initializer)
-    : Event(type, initializer), m_scriptState(state) {
+    : Event(type, initializer),
+      m_scriptState(state),
+      m_promise(this),
+      m_reason(this) {
   ThreadState::current()->registerPreFinalizer(this);
   DCHECK(initializer.hasPromise());
   m_promise.set(initializer.promise().isolate(),
                 initializer.promise().v8Value());
   m_promise.setPhantom();
   if (initializer.hasReason()) {
     m_reason.set(initializer.reason().isolate(),
                  initializer.reason().v8Value());
     m_reason.setPhantom();
   }
@@ skipping 51 matching lines @@
     const DOMWrapperWorld& world) const {
   return m_scriptState && m_scriptState->contextIsValid() &&
          m_scriptState->world().worldId() == world.worldId();
 }
 
 DEFINE_TRACE(PromiseRejectionEvent) {
   Event::trace(visitor);
 }
 
 DEFINE_TRACE_WRAPPERS(PromiseRejectionEvent) {
-  visitor->traceWrappers(&m_promise);
-  visitor->traceWrappers(&m_reason);
+  visitor->traceWrappers(m_promise);
+  visitor->traceWrappers(m_reason);
 }
 
 }  // namespace blink