https://bugs.webkit.org/show_bug.cgi?id=68480
De-virtualize containingBlock() and make RenderView return 0 instead
of itself to make the construction of normal loops that terminate via
a null-check possible.
Fix the only two places in the tree that needed null checks.
Eliminating RenderTableCell::containingBlock() is fine since the base class
does the same thing anyway.
Reviewed by Simon Fraser.
* editing/VisiblePosition.cpp:
(WebCore::VisiblePosition::lineDirectionPointForBlockDirectionNavigation):
* rendering/RenderObject.cpp:
(WebCore::RenderObject::containingBlock):
* rendering/RenderObject.h:
* rendering/RenderTableCell.cpp:
* rendering/RenderTableCell.h:
* rendering/RenderTreeAsText.cpp:
(WebCore::RenderTreeAsText::writeRenderObject):
* rendering/RenderView.cpp:
* rendering/RenderView.h:
git-svn-id: http://svn.webkit.org/repository/webkit/trunk@95573 268f45cc-cd09-0410-ab3c-d52691b4dbfc
9 files changed
