Clean up htmlediting

Source/core/editing/BreakBlockquoteCommand.cpp

Index: Source/core/editing/BreakBlockquoteCommand.cpp
diff --git a/Source/core/editing/BreakBlockquoteCommand.cpp b/Source/core/editing/BreakBlockquoteCommand.cpp
index 021ef38f41bea358e75ab167f66a211aae04ebdf..240a60495b45968f69a5b21acd678bcc8d30b128 100644
--- a/Source/core/editing/BreakBlockquoteCommand.cpp
+++ b/Source/core/editing/BreakBlockquoteCommand.cpp
@@ -152,7 +152,7 @@ void BreakBlockquoteCommand::doApply()
             // find the first one so that we know where to start numbering.
             while (listChildNode && !isHTMLLIElement(*listChildNode))
                 listChildNode = listChildNode->nextSibling();
-            if (listChildNode && listChildNode->renderer() && listChildNode->renderer()->isListItem())
+            if (isListItem(listChildNode))
                 setNodeAttribute(clonedChild, startAttr, AtomicString::number(toRenderListItem(listChildNode->renderer())->value()));
         }