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

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 70e219390964376ad583cc952b9d61d87fe6a58b..8a6da769b948fca5978a28537570b2054c25de53 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -447,6 +447,7 @@ const int kStubMinorKeyBits = kSmiValueSize - kStubMajorKeyBits - 1;
                                                                 \
   V(FIXED_ARRAY_TYPE)                                           \
   V(FIXED_DOUBLE_ARRAY_TYPE)                                    \
+  V(FEEDBACK_VECTOR_TYPE)                                       \
   V(SHARED_FUNCTION_INFO_TYPE)                                  \
   V(WEAK_CELL_TYPE)                                             \
                                                                 \
@@ -739,6 +740,7 @@ enum InstanceType {
   DEBUG_INFO_TYPE,
   BREAK_POINT_INFO_TYPE,
   FIXED_ARRAY_TYPE,
+  FEEDBACK_VECTOR_TYPE,
   SHARED_FUNCTION_INFO_TYPE,
   CELL_TYPE,
   WEAK_CELL_TYPE,