CallICStub with a "never patch" approach until customization.

src/compiler.cc

Index: src/compiler.cc
diff --git a/src/compiler.cc b/src/compiler.cc
index 5690455b810caf8b5ec2099edaf0282e96a970da..e892a2d864c3617e1bdd2e7f506d545cec0c8f25 100644
--- a/src/compiler.cc
+++ b/src/compiler.cc
@@ -260,16 +260,7 @@ void CompilationInfo::PrepareForCompilation(Scope* scope) {
   int length = function()->slot_count();
   if (feedback_vector_.is_null()) {
     // Allocate the feedback vector too.
-    feedback_vector_ = isolate()->factory()->NewFixedArray(length, TENURED);
-    // Ensure we can skip the write barrier
-    ASSERT_EQ(isolate()->heap()->uninitialized_symbol(),
-              *TypeFeedbackInfo::UninitializedSentinel(isolate()));
-    for (int i = 0; i < length; i++) {
-      feedback_vector_->set(
-          i,
-          *TypeFeedbackInfo::UninitializedSentinel(isolate()),
-          SKIP_WRITE_BARRIER);
-    }
+    feedback_vector_ = isolate()->factory()->NewTypeFeedbackVector(length);
   }
   ASSERT(feedback_vector_->length() == length);
 }