[ic] Avoid feedback metadata names table reallocations.

src/type-feedback-vector.cc

Index: src/type-feedback-vector.cc
diff --git a/src/type-feedback-vector.cc b/src/type-feedback-vector.cc
index e0e6e95a14b9f3e603034b470affbefaf5262e9d..30bc2d41535c6af7383f6e57e29e8c86dc8050b7 100644
--- a/src/type-feedback-vector.cc
+++ b/src/type-feedback-vector.cc
@@ -102,9 +102,7 @@ Handle<TypeFeedbackMetadata> TypeFeedbackMetadata::New(Isolate* isolate,
 
   Handle<UnseededNumberDictionary> names;
   if (name_count) {
-    names = UnseededNumberDictionary::New(
-        isolate, base::bits::RoundUpToPowerOfTwo32(name_count), TENURED,
-        USE_CUSTOM_MINIMUM_CAPACITY);
+    names = UnseededNumberDictionary::New(isolate, name_count, TENURED);
   }
 
   int name_index = 0;
@@ -114,7 +112,10 @@ Handle<TypeFeedbackMetadata> TypeFeedbackMetadata::New(Isolate* isolate,
     if (SlotRequiresName(kind)) {
       Handle<String> name = spec->GetName(name_index);
       DCHECK(!name.is_null());
-      names = UnseededNumberDictionary::AtNumberPut(names, i, name);
+      Handle<UnseededNumberDictionary> new_names =
+          UnseededNumberDictionary::AtNumberPut(names, i, name);
+      DCHECK_EQ(*new_names, *names);
+      names = new_names;
       name_index++;
     }
   }