Revert of [oilpan]: Remove support for tracing off-heap hashmaps.

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 832 matching lines @@
 #define WillBePersistentHeapHashCountedSet blink::PersistentHeapHashCountedSet
 #define WillBeGarbageCollectedMixin blink::GarbageCollectedMixin
 #define WillBeHeapSupplement blink::HeapSupplement
 #define WillBeHeapSupplementable blink::HeapSupplementable
 #define WillBePersistentHeapSupplementable blink::PersistentHeapSupplementable
 #define WillBeHeapTerminatedArray blink::HeapTerminatedArray
 #define WillBeHeapTerminatedArrayBuilder blink::HeapTerminatedArrayBuilder
 #define WillBeHeapLinkedStack blink::HeapLinkedStack
 #define PersistentHeapHashSetWillBeHeapHashSet blink::HeapHashSet
 #define PersistentHeapDequeWillBeHeapDeque blink::HeapDeque
-#define PersistentHeapVectorWillBeHeapVector blink::HeapVector
 
 template<typename T> PassRefPtrWillBeRawPtr<T> adoptRefWillBeNoop(T* ptr)
 {
     static const bool notRefCountedGarbageCollected = !WTF::IsSubclassOfTemplate<typename WTF::RemoveConst<T>::Type, RefCountedGarbageCollected>::value;
     static const bool notRefCounted = !WTF::IsSubclassOfTemplate<typename WTF::RemoveConst<T>::Type, RefCounted>::value;
     COMPILE_ASSERT(notRefCountedGarbageCollected, useAdoptRefCountedWillBeRefCountedGarbageCollected);
     COMPILE_ASSERT(notRefCounted, youMustAdopt);
     return PassRefPtrWillBeRawPtr<T>(ptr);
 }
 
@@ skipping 100 matching lines @@
 #define WillBePersistentHeapHashCountedSet WTF::HashCountedSet
 #define WillBeGarbageCollectedMixin blink::DummyBase<void>
 #define WillBeHeapSupplement blink::Supplement
 #define WillBeHeapSupplementable blink::Supplementable
 #define WillBePersistentHeapSupplementable blink::Supplementable
 #define WillBeHeapTerminatedArray WTF::TerminatedArray
 #define WillBeHeapTerminatedArrayBuilder WTF::TerminatedArrayBuilder
 #define WillBeHeapLinkedStack WTF::LinkedStack
 #define PersistentHeapHashSetWillBeHeapHashSet blink::PersistentHeapHashSet
 #define PersistentHeapDequeWillBeHeapDeque blink::PersistentHeapDeque
-#define PersistentHeapVectorWillBeHeapVector blink::PersistentHeapVector
 
 template<typename T> PassRefPtrWillBeRawPtr<T> adoptRefWillBeNoop(T* ptr) { return adoptRef(ptr); }
 template<typename T> PassRefPtrWillBeRawPtr<T> adoptRefWillBeRefCountedGarbageCollected(T* ptr) { return adoptRef(ptr); }
 template<typename T> PassRefPtrWillBeRawPtr<T> adoptRefWillBeThreadSafeRefCountedGarbageCollected(T* ptr) { return adoptRef(ptr); }
 template<typename T> PassOwnPtrWillBeRawPtr<T> adoptPtrWillBeNoop(T* ptr) { return adoptPtr(ptr); }
 template<typename T> PassOwnPtrWillBeRawPtr<T> adoptPtrWillBeRefCountedGarbageCollected(T* ptr) { return adoptPtr(ptr); }
 
 template<typename T> T* adoptRefCountedGarbageCollectedWillBeNoop(T* ptr)
 {
     static const bool isRefCountedGarbageCollected = WTF::IsSubclassOfTemplate<typename WTF::RemoveConst<T>::Type, RefCountedGarbageCollected>::value;
@@ skipping 207 matching lines @@
 struct ParamStorageTraits<T*> : public PointerParamStorageTraits<T*, blink::IsGarbageCollectedType<T>::value> {
 };
 
 template<typename T>
 struct ParamStorageTraits<RawPtr<T> > : public PointerParamStorageTraits<T*, blink::IsGarbageCollectedType<T>::value> {
 };
 
 } // namespace WTF
 
 #endif