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

src/deoptimizer.h

Index: src/deoptimizer.h
diff --git a/src/deoptimizer.h b/src/deoptimizer.h
index 8d06956818e58840f45c20a227351af9dd6d4d14..607d3c8cbde0f0b6b6bae7fdfc099273f53a21eb 100644
--- a/src/deoptimizer.h
+++ b/src/deoptimizer.h
@@ -335,6 +335,7 @@ class OptimizedFunctionVisitor BASE_EMBEDDED {
   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")                                            \