Give correct value ranges to enumeration types used as opaque types.

src/objects.h

 // Copyright 2006-2009 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 2744 matching lines @@
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(ExternalFloatArray);
 };
 
 
 // Code describes objects with on-the-fly generated machine code.
 class Code: public HeapObject {
  public:
   // Opaque data type for encapsulating code flags like kind, inline
   // cache state, and arguments count.
-  enum Flags { };
+  // FLAGS_MIN_VALUE and FLAGS_MAX_VALUE are specified to ensure that
+  // enumeration type has correct value range (see Issue 830 for more details).
+  enum Flags {
+    FLAGS_MIN_VALUE = kMinInt,
+    FLAGS_MAX_VALUE = kMaxInt
+  };
 
   enum Kind {
     FUNCTION,
     STUB,
     BUILTIN,
     LOAD_IC,
     KEYED_LOAD_IC,
     CALL_IC,
     KEYED_CALL_IC,
     STORE_IC,
@@ skipping 2679 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_