AOT: Reassign class ids so class hierarchies have contiguous ranges.

runtime/vm/raw_object.cc

Index: runtime/vm/raw_object.cc
diff --git a/runtime/vm/raw_object.cc b/runtime/vm/raw_object.cc
index 73070ac2451388bbe710e2a7e5e827bd1c537922..e4200b9a8c2872e4ed9fff28fed05c70cef1a645 100644
--- a/runtime/vm/raw_object.cc
+++ b/runtime/vm/raw_object.cc
@@ -637,7 +637,6 @@ intptr_t RawContextScope::VisitContextScopePointers(
 
 intptr_t RawICData::VisitICDataPointers(RawICData* raw_obj,
                                         ObjectPointerVisitor* visitor) {
-  // Make sure that we got here with the tagged pointer as this.
   visitor->VisitPointers(raw_obj->from(), raw_obj->to());
   return ICData::InstanceSize();
 }