When adjusting page's live bytes counter from the mutator adjust owners unswept free bytes counter.

src/builtins.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 393 matching lines @@
   heap->CreateFillerObjectAt(elms->address(), to_trim * kPointerSize);
 
   former_start[to_trim] = heap->fixed_array_map();
   former_start[to_trim + 1] = Smi::FromInt(len - to_trim);
 
   // Maintain marking consistency for HeapObjectIterator and
   // IncrementalMarking.
   int size_delta = to_trim * kPointerSize;
   if (heap->marking()->TransferMark(elms->address(),
                                     elms->address() + size_delta)) {
-    MemoryChunk::IncrementLiveBytes(elms->address(), -size_delta);
+    MemoryChunk::IncrementLiveBytesFromMutator(elms->address(), -size_delta);
   }
 
   return FixedArray::cast(HeapObject::FromAddress(
       elms->address() + to_trim * kPointerSize));
 }
 
 
 static bool ArrayPrototypeHasNoElements(Heap* heap,
                                         Context* global_context,
                                         JSObject* array_proto) {
@@ skipping 1403 matching lines @@
   return Handle<Code>(code_address);                        \
 }
 BUILTIN_LIST_C(DEFINE_BUILTIN_ACCESSOR_C)
 BUILTIN_LIST_A(DEFINE_BUILTIN_ACCESSOR_A)
 BUILTIN_LIST_DEBUG_A(DEFINE_BUILTIN_ACCESSOR_A)
 #undef DEFINE_BUILTIN_ACCESSOR_C
 #undef DEFINE_BUILTIN_ACCESSOR_A
 
 
 } }  // namespace v8::internal