Remove unused byte from Map::instance_sizes field.

test/cctest/test-heap.cc

 // Copyright 2012 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 5369 matching lines @@
     int padding_size = desired_offset - Page::kObjectStartOffset;
     int padding_array_length =
         (padding_size - FixedArray::kHeaderSize) / kPointerSize;
 
     Handle<FixedArray> temp2 =
         factory->NewFixedArray(padding_array_length, TENURED);
     Page* page = Page::FromAddress(temp2->address());
     CHECK_EQ(Page::kObjectStartOffset, page->Offset(temp2->address()));
   }
 
-  Handle<JSObject> o = factory->NewJSObjectFromMap(map1, TENURED, false);
+  Handle<JSObject> o = factory->NewJSObjectFromMap(map1, TENURED);
   o->set_properties(*factory->empty_fixed_array());
 
   // Ensure that the object allocated where we need it.
   Page* page = Page::FromAddress(o->address());
   CHECK_EQ(desired_offset, page->Offset(o->address()));
 
   // Now we have an object right at the end of the page.
 
   // Enable incremental marking to trigger actions in Heap::AdjustLiveBytes()
   // that would cause crash.
@@ skipping 647 matching lines @@
                                  array->address(),
                                  array->address() + array->Size());
   DCHECK(reinterpret_cast<void*>(buffer->Get(1)) ==
          HeapObject::RawField(heap->empty_fixed_array(),
                               FixedArrayBase::kLengthOffset));
   DCHECK(reinterpret_cast<void*>(buffer->Get(2)) ==
          HeapObject::RawField(heap->empty_fixed_array(),
                               FixedArrayBase::kLengthOffset));
   delete buffer;
 }