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

runtime/vm/precompiler.h

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_PRECOMPILER_H_
 #define VM_PRECOMPILER_H_
 
 #include "vm/allocation.h"
 #include "vm/hash_map.h"
 #include "vm/hash_table.h"
@@ skipping 317 matching lines @@
     virtual ~Visitor() {}
     virtual void Visit(const T& obj) = 0;
   };
   typedef Visitor<Function> FunctionVisitor;
   typedef Visitor<Class> ClassVisitor;
 
   void VisitFunctions(FunctionVisitor* visitor);
   void VisitClasses(ClassVisitor* visitor);
 
   void FinalizeAllClasses();
+  void SortClasses();
+  void RemapClassIds(intptr_t* old_to_new_cid);
 
   Thread* thread() const { return thread_; }
   Zone* zone() const { return zone_; }
   Isolate* isolate() const { return isolate_; }
 
   Thread* thread_;
   Zone* zone_;
   Isolate* isolate_;
 
   const bool reset_fields_;
@@ skipping 49 matching lines @@
     return function.raw();
   }
 };
 
 typedef UnorderedHashSet<FunctionsTraits> UniqueFunctionsSet;
 
 
 }  // namespace dart
 
 #endif  // VM_PRECOMPILER_H_