[heap] Remove markbits getter from raw address

test/cctest/heap/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 6662 matching lines @@
   CHECK(page->markbits()->AllBitsSetInRange(
       page->AddressToMarkbitIndex(start_address),
       page->AddressToMarkbitIndex(end_address)));
   CHECK(heap->old_space()->Contains(*array));
 
   // Trim it once by one word to make checking for white marking color uniform.
   Address previous = end_address - kPointerSize;
   heap->RightTrimFixedArray(*array, 1);
   HeapObject* filler = HeapObject::FromAddress(previous);
   CHECK(filler->IsFiller());
-  CHECK(Marking::IsImpossible(ObjectMarking::MarkBitFrom(previous)));
+  CHECK(Marking::IsImpossible(ObjectMarking::MarkBitFrom(filler)));
 
   // Trim 10 times by one, two, and three word.
   for (int i = 1; i <= 3; i++) {
     for (int j = 0; j < 10; j++) {
       previous -= kPointerSize * i;
       heap->RightTrimFixedArray(*array, i);
       HeapObject* filler = HeapObject::FromAddress(previous);
       CHECK(filler->IsFiller());
-      CHECK(Marking::IsWhite(ObjectMarking::MarkBitFrom(previous)));
+      CHECK(Marking::IsWhite(ObjectMarking::MarkBitFrom(filler)));
     }
   }
 
   heap::GcAndSweep(heap, OLD_SPACE);
 }
 
 TEST(Regress618958) {
   if (!i::FLAG_incremental_marking) return;
   CcTest::InitializeVM();
   v8::HandleScope scope(CcTest::isolate());
@@ skipping 129 matching lines @@
     double deadline = heap->MonotonicallyIncreasingTimeInMs() + 1;
     marking->AdvanceIncrementalMarking(
         deadline, IncrementalMarking::GC_VIA_STACK_GUARD,
         IncrementalMarking::FORCE_COMPLETION, StepOrigin::kV8);
   }
   DCHECK(marking->IsStopped());
 }
 
 }  // namespace internal
 }  // namespace v8