HasOnlyAsciiChars can return incorrect results. Fixup usages and rename.

include/v8.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 1165 matching lines @@
    */
   int Length() const;
 
   /**
    * Returns the number of bytes in the UTF-8 encoded
    * representation of this string.
    */
   int Utf8Length() const;
 
   /**
-   * A fast conservative check for non-ASCII characters.  May
-   * return true even for ASCII strings, but if it returns
-   * false you can be sure that all characters are in the range
-   * 0-127.
+   * This function is no longer useful.
    */
-  bool MayContainNonAscii() const;
+  // TODO(dcarney): deprecate

[tfarina, 2013/04/26 16:31:52]

can we use V8_DEPRECATED?

+  V8_INLINE(bool MayContainNonAscii()) const { return true; }
 
   /**
    * Returns whether this string contains only one byte data.
    */
   bool IsOneByte() const;
 
   /**
    * Write the contents of the string to an external buffer.
    * If no arguments are given, expects the buffer to be large
    * enough to hold the entire string and NULL terminator. Copies
@@ skipping 4143 matching lines @@
 
 
 }  // namespace v8
 
 
 #undef V8EXPORT
 #undef TYPE_CHECK
 
 
 #endif  // V8_H_