Qt can be configured to have all of its classes inside a specified namespaces.
This is for example used in plugin/component environments like Eclipse.

This change makes it possible to let the Qt port compile against a namespaced
Qt by the use of macros Qt provides to properly forward declare Qt classes in
the namespace.

Signed-off-by: Simon


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@31899 268f45cc-cd09-0410-ab3c-d52691b4dbfc