28     heap_->UnregisterStrongRoots(strong_roots_entry_);  in Clear()
52   Address not_mapped = ReadOnlyRoots(heap_).not_mapped_symbol().ptr();  in ScanKeysFor()
66   DCHECK_EQ(gc_counter_, heap_->gc_count());  in InsertKey()
73   Address not_mapped = ReadOnlyRoots(heap_).not_mapped_symbol().ptr();  in InsertKey()
95   Address not_mapped = ReadOnlyRoots(heap_).not_mapped_symbol().ptr();  in DeleteIndex()
136   if (index < 0 && gc_counter_ != heap_->gc_count()) {  in Lookup()
151     if (gc_counter_ != heap_->gc_count()) Rehash();  in LookupOrInsert()
161   CHECK_NE(address, ReadOnlyRoots(heap_).not_mapped_symbol().ptr());  in Hash()
200     gc_counter_ = heap_->gc_count();  in InsertEntry()
203     Address not_mapped = ReadOnlyRoots(heap_).not_mapped_symbol().ptr();  in InsertEntry()
209         heap_->RegisterStrongRoots("IdentityMapBase", FullObjectSlot(keys_),  in InsertEntry()
213     if (gc_counter_ != heap_->gc_count()) Rehash();  in InsertEntry()
237   DCHECK_NE(keys_[index], ReadOnlyRoots(heap_).not_mapped_symbol().ptr());  in KeyAtIndex()
245   DCHECK_NE(keys_[index], ReadOnlyRoots(heap_).not_mapped_symbol().ptr());  in EntryAtIndex()
254   Address not_mapped = ReadOnlyRoots(heap_).not_mapped_symbol().ptr();  in NextIndex()
266   gc_counter_ = heap_->gc_count();  in Rehash()
272   Address not_mapped = ReadOnlyRoots(heap_).not_mapped_symbol().ptr();  in Rehash()
306   gc_counter_ = heap_->gc_count();  in Resize()
310   Address not_mapped = ReadOnlyRoots(heap_).not_mapped_symbol().ptr();  in Resize()
324   heap_->UpdateStrongRoots(strong_roots_entry_, FullObjectSlot(keys_),  in Resize()