Introduce new API to expose external string resource regardless of encoding.

Introduce new API to expose external string resource regardless of encoding.

BUG=

Committed: https://code.google.com/p/v8/source/detail?r=12488

[Yang, 2012-09-12 10:23:55]

This is a follow-up to http://codereview.chromium.org/10918169/

I changed the encoding to use an enum instead of constants.

I also changed the signature of GetExternalStringResourceBase to return the
resource base as return value and return the encoding as call-by-reference
variable. The semantic changed slightly: if the string is not an external
string, the encoding is returned nevertheless (bit masking should be just as
cheap as assigning 0 to the return value).

[drcarney, 2012-09-12 11:27:09]

lgtm

http://codereview.chromium.org/10917211/diff/1/include/v8.h
File include/v8.h (right):

http://codereview.chromium.org/10917211/diff/1/include/v8.h#newcode1243
include/v8.h:1243: * ASCII content is necessary.
Looks like this comment accidentally slipped in.

[Yang, 2012-09-12 11:28:50]

Addressed comments. Landing...

http://codereview.chromium.org/10917211/diff/1/include/v8.h
File include/v8.h (right):

http://codereview.chromium.org/10917211/diff/1/include/v8.h#newcode1243
include/v8.h:1243: * ASCII content is necessary.
On 2012/09/12 11:27:09, dcarney wrote:
> Looks like this comment accidentally slipped in.

Done.