Refactor incremental marking to use static visitor.

src/incremental-marking.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 35 matching lines @@
     COMPLETE
   };
 
   enum CompletionAction {
     GC_VIA_STACK_GUARD,
     NO_GC_VIA_STACK_GUARD
   };
 
   explicit IncrementalMarking(Heap* heap);
 
+  static void Initialize();
+
   void TearDown();
 
   State state() {
     ASSERT(state_ == STOPPED || FLAG_incremental_marking);
     return state_;
   }
 
   bool should_hurry() { return should_hurry_; }
   void set_should_hurry(bool val) { should_hurry_ = val; }
 
@@ skipping 186 matching lines @@
   void DeactivateIncrementalWriteBarrier();
 
   static void SetOldSpacePageFlags(MemoryChunk* chunk,
                                    bool is_marking,
                                    bool is_compacting);
 
   static void SetNewSpacePageFlags(NewSpacePage* chunk, bool is_marking);
 
   void EnsureMarkingDequeIsCommitted();
 
-  void VisitGlobalContext(Context* ctx, ObjectVisitor* v);
-
   Heap* heap_;
 
   State state_;
   bool is_compacting_;
 
   VirtualMemory* marking_deque_memory_;
   bool marking_deque_memory_committed_;
   MarkingDeque marking_deque_;
   Marker<IncrementalMarking> marker_;
 
@@ skipping 11 matching lines @@
   intptr_t allocated_;
 
   int no_marking_scope_depth_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(IncrementalMarking);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_INCREMENTAL_MARKING_H_