Use WeakCells in the optimized code map rather than traversing in pause.

src/deoptimizer.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_DEOPTIMIZER_H_
 #define V8_DEOPTIMIZER_H_
 
 #include "src/allocation.h"
 #include "src/macro-assembler.h"
 
@@ skipping 317 matching lines @@
     "Insufficient type feedback for generic named access")                     \
   V(kInsufficientTypeFeedbackForKeyedLoad,                                     \
     "Insufficient type feedback for keyed load")                               \
   V(kInsufficientTypeFeedbackForKeyedStore,                                    \
     "Insufficient type feedback for keyed store")                              \
   V(kInsufficientTypeFeedbackForLHSOfBinaryOperation,                          \
     "Insufficient type feedback for LHS of binary operation")                  \
   V(kInsufficientTypeFeedbackForRHSOfBinaryOperation,                          \
     "Insufficient type feedback for RHS of binary operation")                  \
   V(kKeyIsNegative, "key is negative")                                         \
+  V(kLiteralsWereDisposed, "literals have been disposed")                      \
   V(kLostPrecision, "lost precision")                                          \
   V(kLostPrecisionOrNaN, "lost precision or NaN")                              \
   V(kMementoFound, "memento found")                                            \
   V(kMinusZero, "minus zero")                                                  \
   V(kNaN, "NaN")                                                               \
   V(kNegativeKeyEncountered, "Negative key encountered")                       \
   V(kNegativeValue, "negative value")                                          \
   V(kNoCache, "no cache")                                                      \
   V(kNonStrictElementsInKeyedLoadGenericStub,                                  \
     "non-strict elements in KeyedLoadGenericStub")                             \
@@ skipping 782 matching lines @@
   Object** expression_stack_;
   int source_position_;
 
   friend class Deoptimizer;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_DEOPTIMIZER_H_