Merge RenderWidget into single subclass, RenderPart

Source/core/rendering/RenderObject.h

Index: Source/core/rendering/RenderObject.h
diff --git a/Source/core/rendering/RenderObject.h b/Source/core/rendering/RenderObject.h
index a9361c299a4aadb3b1d6759c4cbcec27091c7090..9a63ae223ce40f4c82274d962a9b56368196daba 100644
--- a/Source/core/rendering/RenderObject.h
+++ b/Source/core/rendering/RenderObject.h
@@ -634,7 +634,7 @@ public:
         return isPseudoElement() ? 0 : node();
     }
 
-    // FIXME: Why does RenderWidget need this?
+    // FIXME: Why does RenderPart need this?

[dsinclair, 2014/10/07 14:15:12]

Can you file a bug for this and add the crbug.com/ reference here? (Feel free to
add the Project-Warden label)


This is called from RenderWidget (now RenderPart) :: destroy(). Why does render
widget, and only render widget, need to clear the node on destroy? Is something
accessing the node after we destroyed the object?

[Zeeshan Qureshi, 2014/10/10 19:32:38]

http://crbug.com/422457

     void clearNode() { m_node = nullptr; }
 
     // Returns the styled node that caused the generation of this renderer.