- clean room rewrite of QCString::operator<<.

        * kwq/KWQCString.mm: (operator<<): Rewrote it.

	- update format of render tree dumping for real use

        * khtml/rendering/render_layer.h: Added elementList().
        * khtml/rendering/render_layer.cpp: (RenderLayer::elementList): Added.

        * kwq/KWQRenderTreeDebug.cpp:
        (operator<<): Added an overload for writing out QRect.
        (writeIndent): Added.
        (write): Use the overload for QRect, also reorganize to dump layers.
        (writeLayers): Use this to dump the layers.
        (externalRepresentation): Call writeLayers instead of write.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@3350 268f45cc-cd09-0410-ab3c-d52691b4dbfc