Keep track of script objects in a weak fixed array.

src/objects.h

 // Copyright 2012 the V8 project 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 V8_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 
 #include "src/allocation.h"
@@ skipping 973 matching lines @@
   V(JSGlobalObject)                \
   V(JSBuiltinsObject)              \
   V(JSGlobalProxy)                 \
   V(UndetectableObject)            \
   V(AccessCheckNeeded)             \
   V(Cell)                          \
   V(PropertyCell)                  \
   V(WeakCell)                      \
   V(ObjectHashTable)               \
   V(WeakHashTable)                 \
-  V(WeakValueHashTable)            \
   V(OrderedHashTable)
 
 // Object is the abstract superclass for all classes in the
 // object hierarchy.
 // Object does not use any virtual functions to avoid the
 // allocation of the C++ vtable.
 // Since both Smi and HeapObject are subclasses of Object no
 // data members can be present in Object.
 class Object {
  public:
@@ skipping 2730 matching lines @@
 
   void AddEntry(int entry, Handle<WeakCell> key, Handle<HeapObject> value);
 
   // Returns the index to the value of an entry.
   static inline int EntryToValueIndex(int entry) {
     return EntryToIndex(entry) + 1;
   }
 };
 
 
-class WeakValueHashTable : public ObjectHashTable {
- public:
-  DECLARE_CAST(WeakValueHashTable)
-
-#ifdef DEBUG
-  // Looks up the value associated with the given key. The hole value is
-  // returned in case the key is not present.
-  Object* LookupWeak(Handle<Object> key);
-#endif  // DEBUG
-
-  // Adds (or overwrites) the value associated with the given key. Mapping a
-  // key to the hole value causes removal of the whole entry.
-  MUST_USE_RESULT static Handle<WeakValueHashTable> PutWeak(
-      Handle<WeakValueHashTable> table, Handle<Object> key,
-      Handle<HeapObject> value);
-
-  static Handle<FixedArray> GetWeakValues(Handle<WeakValueHashTable> table);
-};
-
-
 // ScopeInfo represents information about different scopes of a source
 // program  and the allocation of the scope's variables. Scope information
 // is stored in a compressed form in ScopeInfo objects and is used
 // at runtime (stack dumps, deoptimization, etc.).
 
 // This object provides quick access to scope info details for runtime
 // routines.
 class ScopeInfo : public FixedArray {
  public:
   DECLARE_CAST(ScopeInfo)
@@ skipping 6481 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_