Add basic support for Latin1 to the API.

src/objects.h

 // Copyright 2012 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 7075 matching lines @@
         : buffer_(Vector<const byte>::cast(chars)),
           state_(TWO_BYTE) { }
     FlatContent() : buffer_(), state_(NON_FLAT) { }
 
     Vector<const byte> buffer_;
     State state_;
 
     friend class String;
   };
 
+  enum AsciiHint { MAYBE_ASCII = 0,
+                   ASCII       = 1,
+                   NOT_ASCII   = 2 };
+
   // Get and set the length of the string.
   inline int length();
   inline void set_length(int value);
 
   // Get and set the hash field of the string.
   inline uint32_t hash_field();
   inline void set_hash_field(uint32_t value);
 
   // Returns whether this string has only ASCII chars, i.e. all of them can
   // be ASCII encoded.  This might be the case even if the string is
@@ skipping 1809 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_