Vector ICs: Introduce an InstanceType for the type feedback 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 a6f72210fc9f2545d77ea92e885a6f801071fadd..6a156e696d3e610a464e7ea383e71f72bce92336 100644
--- a/src/type-feedback-vector.h
+++ b/src/type-feedback-vector.h
@@ -9,7 +9,6 @@
 
 #include "src/checks.h"
 #include "src/elements-kind.h"
-#include "src/heap/heap.h"
 #include "src/isolate.h"
 #include "src/objects.h"
 #include "src/zone-containers.h"
@@ -186,12 +185,18 @@ class TypeFeedbackVector : public FixedArray {
   Code::Kind GetKind(FeedbackVectorICSlot slot) const;
 
   template <typename Spec>
-  static Handle<TypeFeedbackVector> Allocate(Isolate* isolate,
-                                             const Spec* spec);
+  static int SizeFor(const Spec* spec);
+
+  template <typename Spec>
+  void Init(Isolate* isolate, const Spec* spec);
 
   static Handle<TypeFeedbackVector> Copy(Isolate* isolate,
                                          Handle<TypeFeedbackVector> vector);
 
+  DECLARE_PRINTER(TypeFeedbackVector)
+
+  void TypeFeedbackVectorVerify();
+
   // Clears the vector slots and the vector ic slots.
   void ClearSlots(SharedFunctionInfo* shared) { ClearSlotsImpl(shared, true); }
   void ClearSlotsAtGCTime(SharedFunctionInfo* shared) {