[Isolates] ScavengeVisitor gets member Heap*.

src/mark-compact.cc

 // Copyright 2006-2008 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 362 matching lines @@
     map->heap()->mark_compact_collector()->SetMark(obj);
     // Mark the map pointer and the body.
     map->heap()->mark_compact_collector()->MarkObject(map);
     IterateBody(map, obj);
   }
 
   // Visit all unmarked objects pointed to by [start, end).
   // Returns false if the operation fails (lack of stack space).
   static inline bool VisitUnmarkedObjects(Object** start, Object** end) {
     // Return false is we are close to the stack limit.
-    StackLimitCheck check;
+    StackLimitCheck check(Isolate::Current());
     if (check.HasOverflowed()) return false;
 
     // Visit the unmarked objects.
     for (Object** p = start; p < end; p++) {
       if (!(*p)->IsHeapObject()) continue;
       HeapObject* obj = HeapObject::cast(*p);
       if (obj->IsMarked()) continue;
       VisitUnmarkedObject(obj);
     }
     return true;
@@ skipping 2238 matching lines @@
 }
 
 
 void MarkCompactCollector::Initialize() {
   StaticPointersToNewGenUpdatingVisitor::Initialize();
   StaticMarkingVisitor::Initialize();
 }
 
 
 } }  // namespace v8::internal