Changes around ascii-check for strings wrt external strings.

Changes around ascii-check for strings wrt external strings.

Committed: http://code.google.com/p/v8/source/detail?r=9662

[Yang, 2011-10-17 09:39:15]

Please take a look. Fixes some edge cases for ascii-ness checking.

[Erik Corry, 2011-10-17 12:05:15]

http://codereview.chromium.org/8312015/diff/1/src/objects-inl.h
File src/objects-inl.h (right):

http://codereview.chromium.org/8312015/diff/1/src/objects-inl.h#newcode296
src/objects-inl.h:296: return
GetUnderlying()->IsAsciiRepresentationUnderneath();
Is it possible to make an arbitraryly deep nesting of a cons of a slice of a
cons of a slice of a...?  If so this risks recursing too deep.

[Yang, 2011-10-17 12:09:59]

My bad. A cons string is flattened before a slice can be created from it.

[Erik Corry, 2011-10-17 12:44:19]

LGTM