Revert "The current growth strategy for growable arrays allocates a backing array of size 2 at (emp…

runtime/vm/class_finalizer.cc

Index: runtime/vm/class_finalizer.cc
diff --git a/runtime/vm/class_finalizer.cc b/runtime/vm/class_finalizer.cc
index 1db6629772b285c9dd4c0405e3d57021a52ef494..f1c3ffc618fe7c9aec21ee40485b19aeaaf9a49f 100644
--- a/runtime/vm/class_finalizer.cc
+++ b/runtime/vm/class_finalizer.cc
@@ -2429,7 +2429,7 @@ void ClassFinalizer::ApplyMixinMembers(const Class& cls) {
       cloned_funcs.Add(func);
     }
   }
-  functions = Array::MakeFixedLength(cloned_funcs);
+  functions = Array::MakeArray(cloned_funcs);
   cls.SetFunctions(functions);
 
   // Now clone the fields from the mixin class. There should be no
@@ -2666,8 +2666,7 @@ void ClassFinalizer::FinalizeClass(const Class& cls) {
     const Class& mixin_cls = Class::Handle(mixin_type.type_class());
 
     CreateForwardingConstructors(cls, mixin_cls, cloned_funcs);
-    const Array& functions =
-        Array::Handle(Array::MakeFixedLength(cloned_funcs));
+    const Array& functions = Array::Handle(Array::MakeArray(cloned_funcs));
     cls.SetFunctions(functions);
   }
   // Every class should have at least a constructor, unless it is a top level