[Isolates] ScavengeVisitor gets member Heap*.

src/spaces.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 567 matching lines @@
 #ifdef DEBUG
   size_t chunk_size = chunks_[chunk_id].size();
   Address high = RoundDown(chunk_start + chunk_size, Page::kPageSize);
   ASSERT(pages_in_chunk <=
         ((OffsetFrom(high) - OffsetFrom(low)) / Page::kPageSize));
 #endif
 
   Address page_addr = low;
   for (int i = 0; i < pages_in_chunk; i++) {
     Page* p = Page::FromAddress(page_addr);
+    p->heap_ = owner->heap();
     p->opaque_header = OffsetFrom(page_addr + Page::kPageSize) | chunk_id;
     p->InvalidateWatermark(true);
     p->SetIsLargeObjectPage(false);
     p->SetAllocationWatermark(p->ObjectAreaStart());
     p->SetCachedAllocationWatermark(p->ObjectAreaStart());
     page_addr += Page::kPageSize;
   }
 
   // Set the next page of the last page to 0.
   Page* last_page = Page::FromAddress(page_addr - Page::kPageSize);
@@ skipping 2449 matching lines @@
   for (HeapObject* obj = obj_it.next(); obj != NULL; obj = obj_it.next()) {
     if (obj->IsCode()) {
       Code* code = Code::cast(obj);
       isolate->code_kind_statistics()[code->kind()] += code->Size();
     }
   }
 }
 #endif  // DEBUG
 
 } }  // namespace v8::internal