Windows build fix. Apparently Visual Studio still has a lot of bugs with respect to nested classes.
Work around it by directly instantiating the class inside createFloatingObjects.

* rendering/RenderBlock.cpp:
(WebCore::RenderBlock::createFloatingObjects): Directly instantiate FloatingObjects.
* rendering/RenderBlock.h:
(RenderBlock): Moved the declaration of createFloatingObjects up.
(FloatingObjects::FloatingObjects):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@143293 268f45cc-cd09-0410-ab3c-d52691b4dbfc