https://bugs.webkit.org/show_bug.cgi?id=122080

Reviewed by Andreas Kling.
        
This is ugly and shows up in profiles too. Use a bit in RenderElement instead.

* rendering/RenderBlock.h:
* rendering/RenderBlockFlow.h:
        
    Move dirtyLinesFromChangedChild down to RenderBlockFlow. It wouldn't do anything on other RenderBlocks.

* rendering/RenderElement.cpp:
(WebCore::RenderElement::RenderElement):
* rendering/RenderElement.h:
        
    Add m_ancestorLineBoxDirty bit. We have 32 unused bits here on 64bit systems.

(WebCore::RenderElement::dirtyLinesFromChangedChild):
(WebCore::RenderElement::ancestorLineBoxDirty):
(WebCore::RenderElement::setAncestorLineBoxDirty):
(WebCore::RenderObject::setNeedsLayout):
* rendering/RenderInline.h:
* rendering/RenderLineBoxList.cpp:
(WebCore::RenderLineBoxList::dirtyLinesFromChangedChild):
            
    Tighten the interface.

* rendering/RenderLineBoxList.h:
* rendering/RenderObject.cpp:
(WebCore::RenderObject::willBeDestroyed):
* rendering/RenderObject.h:
        
    Remove the static map.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@156639 268f45cc-cd09-0410-ab3c-d52691b4dbfc