https://bugs.webkit.org/show_bug.cgi?id=100576

Reviewed by Darin Adler.

Source/JavaScriptCore: 

Changed singleEscape() processing to be based on a lookup of a static table.  The table
covers ASCII characters SPACE through DEL.  If a character can be a single character escape,
then the table provides the non-zero result of that escape.  Updated the result of
singleEscape to be an LChar to make the table as small as possible.
Added a new test fast/js/normal-character-escapes-in-string-literals.html to validated
the behavior.

* parser/Lexer.cpp:
(JSC::singleEscape):
(JSC::Lexer::parseString):
(JSC::Lexer::parseStringSlowCase):

LayoutTests: 

Added a new test to validated the behavior of the corresponding changes to string processing
in the Lexer.

* fast/js/normal-character-escapes-in-string-literals-expected.txt: Added.
* fast/js/normal-character-escapes-in-string-literals.html: Added.
* fast/js/script-tests/normal-character-escapes-in-string-literals.js: Added.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@132853 268f45cc-cd09-0410-ab3c-d52691b4dbfc