Move 'list-style-image' CSS property to the new StyleBuilder
https://bugs.webkit.org/show_bug.cgi?id=139763

Reviewed by Antti Koivisto.

Move 'list-style-image' CSS property to the new StyleBuilder
by reusing an existing Converter helper and renaming it for
clarity.

No new tests, no behavior change.

* css/CSSPropertyNames.in:
* css/DeprecatedStyleBuilder.cpp:
(WebCore::DeprecatedStyleBuilder::DeprecatedStyleBuilder):
(WebCore::ApplyPropertyStyleImage::applyValue): Deleted.
(WebCore::ApplyPropertyStyleImage::createHandler): Deleted.
* css/StyleBuilderConverter.h:
(WebCore::StyleBuilderConverter::convertStyleImage):
(WebCore::StyleBuilderConverter::convertBorderImageSource): Deleted.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@177489 268f45cc-cd09-0410-ab3c-d52691b4dbfc