Revert trunk to version 3.16.4.

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 405 matching lines @@
  public:
   explicit CodeFlusher(Isolate* isolate)
       : isolate_(isolate),
         jsfunction_candidates_head_(NULL),
         shared_function_info_candidates_head_(NULL) {}
 
   void AddCandidate(SharedFunctionInfo* shared_info) {
     if (GetNextCandidate(shared_info) == NULL) {
       SetNextCandidate(shared_info, shared_function_info_candidates_head_);
       shared_function_info_candidates_head_ = shared_info;
-    } else {
-      // TODO(mstarzinger): Active in release mode to flush out problems.
-      // Should be turned back into an ASSERT or removed completely.
-      CHECK(ContainsCandidate(shared_info));
     }
   }
 
   void AddCandidate(JSFunction* function) {
     ASSERT(function->code() == function->shared()->code());
     if (GetNextCandidate(function)->IsUndefined()) {
       SetNextCandidate(function, jsfunction_candidates_head_);
       jsfunction_candidates_head_ = function;
     }
   }
 
-  bool ContainsCandidate(SharedFunctionInfo* shared_info);
-
   void EvictCandidate(SharedFunctionInfo* shared_info);
   void EvictCandidate(JSFunction* function);
 
   void ProcessCandidates() {
     ProcessSharedFunctionInfoCandidates();
     ProcessJSFunctionCandidates();
   }
 
   void EvictAllCandidates() {
     EvictJSFunctionCandidates();
@@ skipping 408 matching lines @@
 
   friend class Heap;
 };
 
 
 const char* AllocationSpaceName(AllocationSpace space);
 
 } }  // namespace v8::internal
 
 #endif  // V8_MARK_COMPACT_H_