Release Oilpan heap singletons prior to LSan leak detection.

third_party/WebKit/Source/bindings/core/v8/RejectedPromises.h

 // 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.
 
 #ifndef RejectedPromises_h
 #define RejectedPromises_h
 
 #include "core/fetch/AccessControlStatus.h"
 #include "platform/heap/Handle.h"
 
 namespace v8 {
 class PromiseRejectMessage;
 };
 
 namespace blink {
 
 class ScriptCallStack;
 class ScriptState;
 
 class RejectedPromises final : public RefCountedWillBeGarbageCollected<RejectedPromises> {
     USING_FAST_MALLOC_WILL_BE_REMOVED(RejectedPromises);
     DECLARE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(RejectedPromises);
 public:
     static PassRefPtrWillBeRawPtr<RejectedPromises> create()
     {
         return adoptRefWillBeNoop(new RejectedPromises);
     }
 
-    RejectedPromises();
     void dispose();
     DECLARE_TRACE();
 
     void rejectedWithNoHandler(ScriptState*, v8::PromiseRejectMessage, const String& errorMessage, const String& resourceName, int scriptId, int lineNumber, int columnNumber, PassRefPtrWillBeRawPtr<ScriptCallStack>, AccessControlStatus);
     void handlerAdded(v8::PromiseRejectMessage);
 
     void processQueue();
 
 private:
     class Message;
 
+    RejectedPromises();
+
     using MessageQueue = WillBeHeapDeque<OwnPtrWillBeMember<Message>>;
-
     PassOwnPtrWillBeRawPtr<MessageQueue> createMessageQueue();
 
     void processQueueNow(PassOwnPtrWillBeRawPtr<MessageQueue>);
     void revokeNow(PassOwnPtrWillBeRawPtr<Message>);
 
     MessageQueue m_queue;
     WillBeHeapVector<OwnPtrWillBeMember<Message>> m_reportedAsErrors;
 };
 
 } // namespace blink
 
 #endif // RejectedPromises_h