Fix code flusher to process weak function links.

src/mark-compact.h

 // Copyright 2012 the V8 project authors. 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
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 423 matching lines @@
     }
   }
 
   void EvictCandidate(JSFunction* function);
 
   void ProcessCandidates() {
     ProcessSharedFunctionInfoCandidates();
     ProcessJSFunctionCandidates();
   }
 
+  void IteratePointersToFromSpace(ObjectVisitor* v);
+
  private:
   void ProcessJSFunctionCandidates();
   void ProcessSharedFunctionInfoCandidates();
 
+  static JSFunction** GetNextCandidateSlot(JSFunction* candidate) {
+    return reinterpret_cast<JSFunction**>(
+        HeapObject::RawField(candidate, JSFunction::kNextFunctionLinkOffset));
+  }
+
   static JSFunction* GetNextCandidate(JSFunction* candidate) {
     Object* next_candidate = candidate->next_function_link();
     return reinterpret_cast<JSFunction*>(next_candidate);
   }
 
   static void SetNextCandidate(JSFunction* candidate,
                                JSFunction* next_candidate) {
     candidate->set_next_function_link(next_candidate);
   }
 
@@ skipping 379 matching lines @@
 
   friend class Heap;
 };
 
 
 const char* AllocationSpaceName(AllocationSpace space);
 
 } }  // namespace v8::internal
 
 #endif  // V8_MARK_COMPACT_H_