https://bugs.webkit.org/show_bug.cgi?id=115516

Reviewed by Anders Carlsson.

ListRefPtr was used only by FontFamily class, besides it strongly depended
on FontFamily class semantics which made it non-generic and inappropriate
for being present inside WTF.

This patch removes WTF::ListRefPtr class and moves its the functionality
into FontFamily class.

Source/WebCore:

No new tests, no change in the behavior.

* page/FrameTree.h:
(FrameTree):
* platform/graphics/FontFamily.h:
(FontFamily):
(WebCore::FontFamily::~FontFamily):
(WebCore):

Source/WTF:

* GNUmakefile.list.am:
* WTF.pro:
* WTF.vcproj/WTF.vcproj:
* WTF.vcxproj/WTF.vcxproj:
* WTF.vcxproj/WTF.vcxproj.filters:
* WTF.xcodeproj/project.pbxproj:
* wtf/CMakeLists.txt:
* wtf/Forward.h:
(WTF):
* wtf/ListRefPtr.h: Removed.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@149523 268f45cc-cd09-0410-ab3c-d52691b4dbfc