Refactor the scanner interface...

Refactor the scanner interface

No need to create sub strings for lazy compiles. The scanner will start from the start position provided.

Moved the creating of character streams into the scanner where possible. This uses a input buffer in the scanner class instead of a stack allocated one.

Added a UTF16 buffer for reading external ascii strings (by templating the external two byte string one) as all the source for the builtins are exposed as external ascii strings.

Committed: http://code.google.com/p/v8/source/detail?r=4007

[Mads Ager (chromium), 2010-03-03 13:04:22]

LGTM