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

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 7fa71d4ac00781a94d1e8f37a79d3cfeb2262d75..ddb3dfa41fc43c35aeb1f9dd1e6cecffcd0777b1 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -6754,8 +6754,12 @@ class SharedFunctionInfo: public HeapObject {
   // Removed a specific optimized code object from the optimized code map.
   void EvictFromOptimizedCodeMap(Code* optimized_code, const char* reason);
 
+  // Unconditionally clear the type feedback vector (including vector ICs).
   void ClearTypeFeedbackInfo();
 
+  // Clear the type feedback vector with a more subtle policy at GC time.
+  void ClearTypeFeedbackInfoAtGCTime();
+
   // Trims the optimized code map after entries have been removed.
   void TrimOptimizedCodeMap(int shrink_by);