Fix error introduced in r167687 and add copy constructor to PersistentHeapVector.

Source/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 296 matching lines @@
 };
 
 // FIXME: derive affinity based on the collection.
 template<typename Collection, ThreadAffinity Affinity = AnyThread>
 class PersistentHeapCollectionBase
     : public Collection
     , public PersistentBase<ThreadLocalPersistents<Affinity>, PersistentHeapCollectionBase<Collection, Affinity> > {
     // Never allocate these objects with new. Use Persistent<Collection> instead.
     DISALLOW_ALLOCATION();
 public:
+    PersistentHeapCollectionBase() { }
+
+    template<typename OtherCollection>
+    PersistentHeapCollectionBase(const OtherCollection& other) : Collection(other) { }
+
     void trace(Visitor* visitor) { visitor->trace(*static_cast<Collection*>(this)); }
 };
 
 template<
     typename KeyArg,
     typename MappedArg,
     typename HashArg = typename DefaultHash<KeyArg>::Hash,
     typename KeyTraitsArg = HashTraits<KeyArg>,
     typename MappedTraitsArg = HashTraits<MappedArg> >
 class PersistentHeapHashMap : public PersistentHeapCollectionBase<HeapHashMap<KeyArg, MappedArg, HashArg, KeyTraitsArg, MappedTraitsArg> > { };
 
 template<
     typename ValueArg,
     typename HashArg = typename DefaultHash<ValueArg>::Hash,
     typename TraitsArg = HashTraits<ValueArg> >
 class PersistentHeapHashSet : public PersistentHeapCollectionBase<HeapHashSet<ValueArg, HashArg, TraitsArg> > { };
 
 template<typename T, size_t inlineCapacity = 0>
-class PersistentHeapVector : public PersistentHeapCollectionBase<HeapVector<T, inlineCapacity> > { };
+class PersistentHeapVector : public PersistentHeapCollectionBase<HeapVector<T, inlineCapacity> > {
+public:
+    PersistentHeapVector() { }
+
+    template<size_t otherCapacity>
+    PersistentHeapVector(const HeapVector<T, otherCapacity>& other)
+        : PersistentHeapCollectionBase<HeapVector<T, inlineCapacity> >(other)
+    {
+    }
+};
 
 // Members are used in classes to contain strong pointers to other oilpan heap
 // allocated objects.
 // All Member fields of a class must be traced in the class' trace method.
 // During the mark phase of the GC all live objects are marked as live and
 // all Member fields of a live object will be traced marked as live as well.
 template<typename T>
 class Member {
     WTF_DISALLOW_CONSTRUCTION_FROM_ZERO(Member);
     WTF_DISALLOW_ZERO_ASSIGNMENT(Member);
@@ skipping 406 matching lines @@
 };
 
 template<typename T> inline T* getPtr(const WebCore::Member<T>& p)
 {
     return p.get();
 }
 
 } // namespace WTF
 
 #endif