Make int an abstract class.

runtime/vm/object.h

 // Copyright (c) 2012, 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_OBJECT_H_
 #define VM_OBJECT_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 857 matching lines @@
   }
 
   bool IsObjectType() const {
     return HasResolvedTypeClass() &&
         Class::Handle(type_class()).IsObjectClass();
   }
 
   // Check if this type represents the 'bool' type.
   bool IsBoolType() const;
 
-  // Check if this type represents the 'int' interface.
-  bool IsIntInterface() const;
+  // Check if this type represents the 'int' type.
+  bool IsIntType() const;
 
   // Check if this type represents the 'double' type.
   bool IsDoubleType() const;
 
   // Check if this type represents the 'num' type.
   bool IsNumberType() const;
 
   // Check if this type represents the 'String' interface.
   bool IsStringInterface() const;
 
@@ skipping 96 matching lines @@
 
   // The 'void' type.
   static RawType* VoidType();
 
   // The 'Object' type.
   static RawType* ObjectType();
 
   // The 'bool' type.
   static RawType* BoolType();
 
-  // The 'int' interface type.
-  static RawType* IntInterface();
+  // The 'int' type.
+  static RawType* IntType();
 
   // The 'Smi' type.
   static RawType* SmiType();
 
   // The 'Mint' type.
   static RawType* MintType();
 
   // The 'double' type.
   static RawType* Double();
 
@@ skipping 4567 matching lines @@
     if (this->CharAt(i) != str.CharAt(begin_index + i)) {
       return false;
     }
   }
   return true;
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_