https://bugs.webkit.org/show_bug.cgi?id=125637

Patch by Martin Hodovan <mhodovan@inf.u-szeged.hu> on 2013-12-18
Reviewed by Darin Adler.

Source/WebCore:

Error recovery in @media is broken if any of its rules misses the opening '{'.
The problem is that when the parser recognises the mistake it removes only the last
WHITESPACE token instead of the whole selector and tries to recover the selector again.
it swallows everything until it finds the next opening bracket. thats why the '}' brackets
of both subrules and even the @media rule are ignored, and the whole @media will be
considered invalid. By joining the selector and its trailing whitespace the error recovery
ignores the bad selector only and keep the @media rule.

Test: fast/css/media-error-recovery.html

* css/CSSGrammar.y.in:

LayoutTests:

Test with broken @media rule.

* fast/css/media-error-recovery-expected.txt: Added.
* fast/css/media-error-recovery.html: Added.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@160779 268f45cc-cd09-0410-ab3c-d52691b4dbfc