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

src/runtime/runtime-array.cc

Index: src/runtime/runtime-array.cc
diff --git a/src/runtime/runtime-array.cc b/src/runtime/runtime-array.cc
index 1617245daf3206fce4638c57e388f88c226f7f8a..612a5fa580788d50fc35bdd6cdbb7949ee90200e 100644
--- a/src/runtime/runtime-array.cc
+++ b/src/runtime/runtime-array.cc
@@ -55,6 +55,15 @@ RUNTIME_FUNCTION(Runtime_SpecialArrayFunctions) {
 }
 
 
+RUNTIME_FUNCTION(Runtime_FeedbackVectorGet) {
+  SealHandleScope shs(isolate);
+  DCHECK(args.length() == 2);
+  CONVERT_ARG_CHECKED(TypeFeedbackVector, object, 0);
+  CONVERT_SMI_ARG_CHECKED(index, 1);
+  return object->get(index);
+}
+
+
 RUNTIME_FUNCTION(Runtime_FixedArrayGet) {
   SealHandleScope shs(isolate);
   DCHECK(args.length() == 2);