[heap] Always use getter when accessing MarkingDeque

src/heap/heap.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/heap/heap.h"
 
 #include "src/accessors.h"
 #include "src/api.h"
 #include "src/ast/context-slot-cache.h"
 #include "src/base/bits.h"
@@ skipping 944 matching lines @@
       isolate()->PrintWithTimestamp(
           "[IncrementalMarking] Scavenge during marking.\n");
     }
   }
 
   if (collector == MARK_COMPACTOR && !ShouldFinalizeIncrementalMarking() &&
       !ShouldAbortIncrementalMarking() && !incremental_marking()->IsStopped() &&
       !incremental_marking()->should_hurry() && FLAG_incremental_marking &&
       OldGenerationSpaceAvailable() <= 0) {
     if (!incremental_marking()->IsComplete() &&
-        !mark_compact_collector()->marking_deque_.IsEmpty() &&
+        !mark_compact_collector()->marking_deque()->IsEmpty() &&
         !FLAG_gc_global) {
       if (FLAG_trace_incremental_marking) {
         isolate()->PrintWithTimestamp(
             "[IncrementalMarking] Delaying MarkSweep.\n");
       }
       collector = SCAVENGER;
       collector_reason = "incremental marking delaying mark-sweep";
     }
   }
 
@@ skipping 5543 matching lines @@
 }
 
 
 // static
 int Heap::GetStaticVisitorIdForMap(Map* map) {
   return StaticVisitorBase::GetVisitorId(map);
 }
 
 }  // namespace internal
 }  // namespace v8