Add kAbortIncrementalMarkingMask flag for GC.

src/mark-compact.h

 // 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 402 matching lines @@
                                    int object_size,
                                    Object* new_object,
                                    int* offset);
 
   // Type of functions to process non-live objects.
   typedef void (*ProcessNonLiveFunction)(HeapObject* object, Isolate* isolate);
 
   // Pointer to member function, used in IterateLiveObjects.
   typedef int (MarkCompactCollector::*LiveObjectCallback)(HeapObject* obj);
 
-  // Set the global force_compaction flag, it must be called before Prepare
-  // to take effect.
+  // Set the global flags, it must be called before Prepare to take effect.
   inline void SetFlags(int flags);
 
-  inline bool PreciseSweepingRequired() {
-    return sweep_precisely_;
-  }
-
   static void Initialize();
 
   void CollectEvacuationCandidates(PagedSpace* space);
 
   void AddEvacuationCandidate(Page* p);
 
   // Prepares for GC by resetting relocation info in old and map spaces and
   // choosing spaces to compact.
   void Prepare(GCTracer* tracer);
 
@@ skipping 131 matching lines @@
   // The current stage of the collector.
   CollectorState state_;
 #endif
 
   // Global flag that forces sweeping to be precise, so we can traverse the
   // heap.
   bool sweep_precisely_;
 
   bool reduce_memory_footprint_;
 
+  bool abort_incremental_marking_;
+
   // True if we are collecting slots to perform evacuation from evacuation
   // candidates.
   bool compacting_;
 
   bool was_marked_incrementally_;
 
   bool collect_maps_;
 
   bool flush_monomorphic_ics_;
 
@@ skipping 174 matching lines @@
 
   friend class Heap;
 };
 
 
 const char* AllocationSpaceName(AllocationSpace space);
 
 } }  // namespace v8::internal
 
 #endif  // V8_MARK_COMPACT_H_