Link type feedback vectors to the shared function info.

src/feedback-vector-inl.h

Index: src/feedback-vector-inl.h
diff --git a/src/feedback-vector-inl.h b/src/feedback-vector-inl.h
index 6f04ea8ea4355174d2ff1ed6715591e840f56a4f..7c5245f0d8751a9d6cd2073d75527b784babc8d8 100644
--- a/src/feedback-vector-inl.h
+++ b/src/feedback-vector-inl.h
@@ -84,7 +84,11 @@ int FeedbackVector::slot_count() const {
 }
 
 FeedbackMetadata* FeedbackVector::metadata() const {
-  return FeedbackMetadata::cast(get(kMetadataIndex));
+  return shared_function_info()->feedback_metadata();
+}
+
+SharedFunctionInfo* FeedbackVector::shared_function_info() const {
+  return SharedFunctionInfo::cast(get(kSharedFunctionInfoIndex));
 }
 
 int FeedbackVector::invocation_count() const {