[heap] Always use getter when accessing MarkingDeque

src/heap/mark-compact.h

 // 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.
 
 #ifndef V8_HEAP_MARK_COMPACT_H_
 #define V8_HEAP_MARK_COMPACT_H_
 
 #include <deque>
 
 #include "src/base/bits.h"
@@ skipping 449 matching lines @@
   // Mark objects in implicit references groups if their parent object
   // is marked.
   void MarkImplicitRefGroups(MarkObjectFunction mark_object);
 
   MarkingDeque* marking_deque() { return &marking_deque_; }
 
   static const size_t kMaxMarkingDequeSize = 4 * MB;
   static const size_t kMinMarkingDequeSize = 256 * KB;
 
   void EnsureMarkingDequeIsCommittedAndInitialize(size_t max_size) {
-    if (!marking_deque_.in_use()) {
+    if (!marking_deque()->in_use()) {
       EnsureMarkingDequeIsCommitted(max_size);
       InitializeMarkingDeque();
     }
   }
 
   void EnsureMarkingDequeIsCommitted(size_t max_size);
   void EnsureMarkingDequeIsReserved();
 
   void InitializeMarkingDeque();
 
@@ skipping 272 matching lines @@
 
  private:
   MarkCompactCollector* collector_;
 };
 
 V8_EXPORT_PRIVATE const char* AllocationSpaceName(AllocationSpace space);
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_HEAP_MARK_COMPACT_H_