Oilpan: Remove out-dated comments from Handle.h

Source/platform/heap/Handle.h

 /*
  * Copyright (C) 2014 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 339 matching lines @@
     CrossThreadWeakPersistent(T& raw) : Parent(raw) { }
     CrossThreadWeakPersistent(const CrossThreadWeakPersistent& other) : Parent(other) { }
     template<typename U>
     CrossThreadWeakPersistent(const CrossThreadWeakPersistent<U>& other) : Parent(other) { }
     template<typename U>
     CrossThreadWeakPersistent(const Member<U>& other) : Parent(other) { }
     template<typename U>
     CrossThreadWeakPersistent(const RawPtr<U>& other) : Parent(other.get()) { }
 };
 
-// PersistentNode must be the left-most class to let the
-// visitor->trace(static_cast<Collection*>(this)) trace the correct position.
-// FIXME: derive affinity based on the collection.
 template<typename Collection>
 class PersistentHeapCollectionBase : public Collection {
     // We overload the various new and delete operators with using the WTF DefaultAllocator to ensure persistent
     // heap collections are always allocated off-heap. This allows persistent collections to be used in
     // DEFINE_STATIC_LOCAL et. al.
     WTF_USE_ALLOCATOR(PersistentHeapCollectionBase, WTF::DefaultAllocator);
 public:
     PersistentHeapCollectionBase()
     {
         initialize();
@@ skipping 19 matching lines @@
     void trace(VisitorDispatcher visitor)
     {
         static_assert(sizeof(Collection), "Collection must be fully defined");
         visitor->trace(*static_cast<Collection*>(this));
     }
 
 private:
     NO_LAZY_SWEEP_SANITIZE_ADDRESS
     void initialize()
     {
+        // FIXME: Derive affinity based on the collection.
         ThreadState* state = ThreadState::current();
         ASSERT(state->checkThread());
         m_persistentNode = state->persistentRegion()->allocatePersistentNode(this, TraceMethodDelegate<PersistentHeapCollectionBase<Collection>, &PersistentHeapCollectionBase<Collection>::trace>::trampoline);
         state->persistentAllocated();
 #if ENABLE(ASSERT)
         m_state = state;
 #endif
     }
 
     void uninitialize()
@@ skipping 768 matching lines @@
 struct ParamStorageTraits<RawPtr<T>> : public PointerParamStorageTraits<T*, blink::IsGarbageCollectedType<T>::value> {
     static_assert(sizeof(T), "T must be fully defined");
 };
 
 template<typename T>
 PassRefPtr<T> adoptRef(blink::RefCountedGarbageCollected<T>*) = delete;
 
 } // namespace WTF
 
 #endif