[stubs] Cleanup FixedArray copying builtin

src/objects.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/objects.h"
 
 #include <cmath>
 #include <iomanip>
 #include <memory>
 #include <sstream>
@@ skipping 15687 matching lines @@
 
 Maybe<bool> JSObject::HasRealNamedCallbackProperty(Handle<JSObject> object,
                                                    Handle<Name> name) {
   LookupIterator it = LookupIterator::PropertyOrElement(
       name->GetIsolate(), object, name, LookupIterator::OWN_SKIP_INTERCEPTOR);
   Maybe<PropertyAttributes> maybe_result = GetPropertyAttributes(&it);
   return maybe_result.IsJust() ? Just(it.state() == LookupIterator::ACCESSOR)
                                : Nothing<bool>();
 }
 
+int FixedArrayBase::GetMaxLengthForNewSpaceAllocation(ElementsKind kind) {
+  return ((Page::kMaxRegularHeapObjectSize - FixedArrayBase::kHeaderSize) >>
+          ElementsKindToShiftSize(kind));
+}
 
 void FixedArray::SwapPairs(FixedArray* numbers, int i, int j) {
   Object* temp = get(i);
   set(i, get(j));
   set(j, temp);
   if (this != numbers) {
     temp = numbers->get(i);
     numbers->set(i, Smi::cast(numbers->get(j)));
     numbers->set(j, Smi::cast(temp));
   }
@@ skipping 3482 matching lines @@
   for (PrototypeIterator iter(isolate, this, kStartAtReceiver,
                               PrototypeIterator::END_AT_NULL);
        !iter.IsAtEnd(); iter.AdvanceIgnoringProxies()) {
     if (iter.GetCurrent<Object>()->IsJSProxy()) return true;
   }
   return false;
 }
 
 }  // namespace internal
 }  // namespace v8