Fix xssauditor bypass with unterminated closing tag by making the HTMLSourceTracker

Fix xssauditor bypass with unterminated closing tag by making the HTMLSourceTracker
and the HTMLParser interact more closely with each other.  HTMLParser should be
setting the end range for the token itself to account for buffering that the
HTMLSourceTracker can't know about, but there are a lot of paths that would need
updating. First step is to cover this one path.
https://bugs.webkit.org/show_bug.cgi?id=68281

Patch by Tom Sepez <tsepez@chromium.org> on 2011-09-19
Reviewed by Adam Barth.

Source/WebCore:

Test: http/tests/security/xssAuditor/script-tag-with-invalid-closing-tag.html

* html/parser/HTMLSourceTracker.cpp:
(WebCore::HTMLSourceTracker::end):
* html/parser/HTMLTokenizer.cpp:
(WebCore::HTMLTokenizer::nextToken):

LayoutTests:

* http/tests/security/xssAuditor/resources/echo-intertag.pl:
* http/tests/security/xssAuditor/script-tag-with-invalid-closing-tag-expected.txt: Added.
* http/tests/security/xssAuditor/script-tag-with-invalid-closing-tag.html: Added.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@95451 268f45cc-cd09-0410-ab3c-d52691b4dbfc