[turbofan] Don't check for neutered array buffers eagerly.

src/isolate.cc

 // Copyright 2012 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/isolate.h"
 
 #include <stdlib.h>
 
 #include <fstream>  // NOLINT(readability/streams)
 #include <sstream>
@@ skipping 2942 matching lines @@
 }
 
 void Isolate::InvalidateArrayIteratorProtector() {
   DCHECK(factory()->array_iterator_protector()->value()->IsSmi());
   DCHECK(IsArrayIteratorLookupChainIntact());
   factory()->array_iterator_protector()->set_value(
       Smi::FromInt(kProtectorInvalid));
   DCHECK(!IsArrayIteratorLookupChainIntact());
 }
 
+void Isolate::InvalidateArrayBufferNeuteringProtector() {
+  DCHECK(factory()->array_buffer_neutering_protector()->value()->IsSmi());
+  DCHECK(IsArrayBufferNeuteringIntact());
+  PropertyCell::SetValueWithInvalidation(
+      factory()->array_buffer_neutering_protector(),
+      handle(Smi::FromInt(kProtectorInvalid), this));
+  DCHECK(!IsArrayBufferNeuteringIntact());
+}
+
 bool Isolate::IsAnyInitialArrayPrototype(Handle<JSArray> array) {
   DisallowHeapAllocation no_gc;
   return IsInAnyContext(*array, Context::INITIAL_ARRAY_PROTOTYPE_INDEX);
 }
 
 
 CallInterfaceDescriptorData* Isolate::call_descriptor_data(int index) {
   DCHECK(0 <= index && index < CallDescriptors::NUMBER_OF_DESCRIPTORS);
   return &call_descriptor_data_[index];
 }
@@ skipping 522 matching lines @@
   // Then check whether this scope intercepts.
   if ((flag & intercept_mask_)) {
     intercepted_flags_ |= flag;
     return true;
   }
   return false;
 }
 
 }  // namespace internal
 }  // namespace v8