https://bugs.webkit.org/show_bug.cgi?id=113401

Reviewed by Benjamin Poulain.

From Blink r149265 by <serya@chromium.org>

Source/WebCore:

CSS logging was disabled in r147028 to prevent message overflow in
the inspector console. This change restores it by modifying the
CSS grammar in order to reduce as much consecutive errors as
possible in 'declaration_list' and 'decl_list' rules.

This way, for rules like 'x { color: ### }' only the first '#'
will be reported as error (instead of 3 identical errors).

The rule 'declaration' still produces multiple errors, because it
does not eat as much errors as possible. So in order not to create
a complex risky patch we just disable logging in the parser for
that rule.

* css/CSSGrammar.y.in:
* css/CSSParser.cpp:
(WebCore::CSSParser::CSSParser):
(WebCore::CSSParser::parseSheet):
(WebCore::CSSParser::syntaxError):
(WebCore::CSSParser::isLoggingErrors):
(WebCore::CSSParser::rewriteSpecifiers):
* css/CSSParser.h:
(CSSParser):

LayoutTests:

Unskipped console-css-warnings.html now that it's working.

* TestExpectations:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@150791 268f45cc-cd09-0410-ab3c-d52691b4dbfc