[heap] Remove heap-local variable caching FLAG_concurrent_sweeping

src/heap/heap.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_HEAP_H_
 #define V8_HEAP_HEAP_H_
 
 #include <cmath>
 #include <map>
 
@@ skipping 941 matching lines @@
   void VisitExternalResources(v8::ExternalResourceVisitor* visitor);
 
   // An object should be promoted if the object has survived a
   // scavenge operation.
   inline bool ShouldBePromoted(Address old_address, int object_size);
 
   void ClearNormalizedMapCaches();
 
   void IncrementDeferredCount(v8::Isolate::UseCounterFeature feature);
 
-  bool concurrent_sweeping_enabled() { return concurrent_sweeping_enabled_; }
-
   inline bool OldGenerationAllocationLimitReached();
 
   void QueueMemoryChunkForFree(MemoryChunk* chunk);
   void FilterStoreBufferEntriesOnAboutToBeFreedPages();
   void FreeQueuedChunks(MemoryChunk* list_head);
   void FreeQueuedChunks();
   void WaitUntilUnmappingOfFreeChunksCompleted();
 
   // Completely clear the Instanceof cache (to stop it keeping objects alive
   // around a GC).
@@ skipping 1382 matching lines @@
   size_t concurrent_unmapping_tasks_active_;
 
   base::Semaphore pending_unmapping_tasks_semaphore_;
 
   base::Mutex relocation_mutex_;
 
   int gc_callbacks_depth_;
 
   bool deserialization_complete_;
 
-  bool concurrent_sweeping_enabled_;
-
   StrongRootsList* strong_roots_list_;
 
   ArrayBufferTracker* array_buffer_tracker_;
 
   // Classes in "heap" can be friends.
   friend class AlwaysAllocateScope;
   friend class GCCallbacksScope;
   friend class GCTracer;
   friend class HeapIterator;
   friend class IdleScavengeObserver;
@@ skipping 363 matching lines @@
   DisallowHeapAllocation no_allocation;  // i.e. no gc allowed.
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(PathTracer);
 };
 #endif  // DEBUG
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_HEAP_HEAP_H_