Revert "Inobject slack tracking is done on a per-closure basis instead of per-shared info basis."

src/mark-compact.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_MARK_COMPACT_H_
 #define V8_MARK_COMPACT_H_
 
 #include "compiler-intrinsics.h"
 #include "spaces.h"
 
@@ skipping 833 matching lines @@
   void ClearNonLiveReferences();
   void ClearNonLivePrototypeTransitions(Map* map);
   void ClearNonLiveMapTransitions(Map* map, MarkBit map_mark);
 
   void ClearDependentCode(DependentCode* dependent_code);
   void ClearDependentICList(Object* head);
   void ClearNonLiveDependentCode(DependentCode* dependent_code);
   int ClearNonLiveDependentCodeInGroup(DependentCode* dependent_code, int group,
                                        int start, int end, int new_start);
 
+  // Marking detaches initial maps from SharedFunctionInfo objects
+  // to make this reference weak. We need to reattach initial maps
+  // back after collection. This is either done during
+  // ClearNonLiveTransitions pass or by calling this function.
+  void ReattachInitialMaps();
+
   // Mark all values associated with reachable keys in weak collections
   // encountered so far.  This might push new object or even new weak maps onto
   // the marking stack.
   void ProcessWeakCollections();
 
   // After all reachable objects have been marked those weak map entries
   // with an unreachable key are removed from all encountered weak maps.
   // The linked list of all encountered weak maps is destroyed.
   void ClearWeakCollections();
 
@@ skipping 120 matching lines @@
  private:
   MarkCompactCollector* collector_;
 };
 
 
 const char* AllocationSpaceName(AllocationSpace space);
 
 } }  // namespace v8::internal
 
 #endif  // V8_MARK_COMPACT_H_