Move addParsedProperty/addParsedProperties to MutableStylePropertySet.
<http://webkit.org/b/114587>

Reviewed by Antti Koivisto.

All CSSParser methods that mutate an existing StylePropertySet now take a MutableStylePropertySet*
instead of a StylePropertySet*.

* css/CSSParser.cpp:
(WebCore::parseColorValue):
(WebCore::parseSimpleLengthValue):
(WebCore::parseKeywordValue):
(WebCore::parseTranslateTransformValue):
(WebCore::CSSParser::parseValue):
(WebCore::CSSParser::parseDeclaration):
* css/CSSParser.h:
(CSSParser):
* css/StylePropertySet.cpp:
(WebCore::StylePropertySet::setProperty):
(WebCore::MutableStylePropertySet::addParsedProperties):
(WebCore::MutableStylePropertySet::addParsedProperty):
* css/StylePropertySet.h:
(StylePropertySet):
(MutableStylePropertySet):
* css/ViewportStyleResolver.h:
(ViewportStyleResolver):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@148400 268f45cc-cd09-0410-ab3c-d52691b4dbfc