Retry "Use a WeakCell in the CallIC type vector."

src/type-feedback-vector.h

Index: src/type-feedback-vector.h
diff --git a/src/type-feedback-vector.h b/src/type-feedback-vector.h
index c8f68bd1fbca8a40f5c92cd0743e65dfeb75d161..c0646a4da7f63259a23971b9c25802e413dbc76b 100644
--- a/src/type-feedback-vector.h
+++ b/src/type-feedback-vector.h
@@ -166,6 +166,12 @@ class TypeFeedbackVector : public FixedArray {
 
   // Clears the vector slots and the vector ic slots.
   void ClearSlots(SharedFunctionInfo* shared);
+  void ClearICSlots(SharedFunctionInfo* shared) {
+    ClearICSlotsImpl(shared, true);
+  }
+  void ClearICSlotsAtGCTime(SharedFunctionInfo* shared) {
+    ClearICSlotsImpl(shared, false);
+  }
 
   // The object that indicates an uninitialized cache.
   static inline Handle<Object> UninitializedSentinel(Isolate* isolate);
@@ -201,6 +207,8 @@ class TypeFeedbackVector : public FixedArray {
   typedef BitSetComputer<VectorICKind, kVectorICKindBits, kSmiValueSize,
                          uint32_t> VectorICComputer;
 
+  void ClearICSlotsImpl(SharedFunctionInfo* shared, bool force_clear);
+
   DISALLOW_IMPLICIT_CONSTRUCTORS(TypeFeedbackVector);
 };