Oilpan: fix PromiseTracker's handling of its persistent promise wrappers.

Source/core/inspector/PromiseTracker.h

 // Copyright 2014 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 PromiseTracker_h
 #define PromiseTracker_h
 
 #include "core/InspectorTypeBuilder.h"
 #include "platform/heap/Handle.h"
 #include "wtf/HashMap.h"
 #include "wtf/Noncopyable.h"
 #include "wtf/RefPtr.h"
 #include "wtf/Vector.h"
 #include <v8.h>
 
 namespace blink {
 
 class ScriptState;
 
-class PromiseTracker FINAL {
+class PromiseTracker FINAL : public NoBaseWillBeGarbageCollected<PromiseTracker> {
     WTF_MAKE_NONCOPYABLE(PromiseTracker);
-    DISALLOW_ALLOCATION();
+    DECLARE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(PromiseTracker);
 public:
-    PromiseTracker();
-    ~PromiseTracker();
+    static PassOwnPtrWillBeRawPtr<PromiseTracker> create()
+    {
+        return adoptPtrWillBeNoop(new PromiseTracker());
+    }
 
     bool isEnabled() const { return m_isEnabled; }
     void setEnabled(bool);
 
     void clear();
 
     void didReceiveV8PromiseEvent(ScriptState*, v8::Handle<v8::Object> promise, v8::Handle<v8::Value> parentPromise, int status);
 
     PassRefPtr<TypeBuilder::Array<TypeBuilder::Debugger::PromiseDetails> > promises();
 
     class PromiseData;
 
     typedef WillBeHeapVector<RefPtrWillBeMember<PromiseData> > PromiseDataVector;
     typedef WillBeHeapHashMap<int, PromiseDataVector> PromiseDataMap;
 
     void trace(Visitor*);
 
+    PromiseDataMap& promiseDataMap() { return m_promiseDataMap; }
+
 private:
+    PromiseTracker();
+
     int circularSequentialId();
     PassRefPtrWillBeRawPtr<PromiseData> createPromiseDataIfNeeded(v8::Isolate*, v8::Handle<v8::Object> promise);
 
-    bool m_isEnabled;
     int m_circularSequentialId;
     PromiseDataMap m_promiseDataMap;
+    bool m_isEnabled;
 };
 
 } // namespace blink
 
 #endif // !defined(PromiseTracker_h)