Improve http-equiv content-language parsing

Improve http-equiv content-language parsing
https://bugs.webkit.org/show_bug.cgi?id=77724

Patch by Matt Falkenhagen <falken@chromium.org> on 2012-02-08
Reviewed by Alexey Proskuryakov.

Add more tests for mapping http-equiv content-language to -webkit-locale. The desired behavior of some
of these is not yet decided, so some of the tests currently fail and the expectations may change. See comments in bug and in the tests.

* fast/text/content-language-case-insensitivity-expected.txt:
* fast/text/content-language-case-insensitivity.html: Style fixes.
* fast/text/content-language-empty-expected.txt: Added.
* fast/text/content-language-empty.html: Added.
* fast/text/content-language-late-expected.txt: Added.
* fast/text/content-language-late.html: Added.
* fast/text/content-language-mapped-to-webkit-locale-expected.txt:
* fast/text/content-language-mapped-to-webkit-locale.html: Style fixes.
* fast/text/content-language-multiple-expected.txt: Added.
* fast/text/content-language-multiple.html: Added.
* fast/text/content-language-no-content-expected.txt: Added.
* fast/text/content-language-no-content.html: Added.
* fast/text/content-language-only-whitespace-expected.txt: Added.
* fast/text/content-language-only-whitespace.html: Added.
* fast/text/content-language-with-whitespace-expected.txt: Added.
* fast/text/content-language-with-whitespace.html: Added.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@107159 268f45cc-cd09-0410-ab3c-d52691b4dbfc