Vector ICs: Introduce an InstanceType for the type feedback vector.

src/factory.h

Index: src/factory.h
diff --git a/src/factory.h b/src/factory.h
index 2de768bf138e328518ab5108c6086eff74556650..564bc874deec6e999fa7de9f6a7a55a2ce6d453a 100644
--- a/src/factory.h
+++ b/src/factory.h
@@ -330,6 +330,9 @@ class Factory final {
   Handle<FixedDoubleArray> CopyFixedDoubleArray(
       Handle<FixedDoubleArray> array);
 
+  Handle<TypeFeedbackVector> CopyTypeFeedbackVector(
+      Handle<TypeFeedbackVector> vector);
+
   // Numbers (e.g. literals) are pretenured by the parser.
   // The return value may be a smi or a heap number.
   Handle<Object> NewNumber(double value,