Fix the Qt build (missing symbols)

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@44463 268f45cc-cd09-0410-ab3c-d52691b4dbfc
diff --git a/WebCore/WebCore.pro b/WebCore/WebCore.pro
index e425b86..f8982bf 100644
--- a/WebCore/WebCore.pro
+++ b/WebCore/WebCore.pro
@@ -698,6 +698,7 @@
     editing/RemoveFormatCommand.cpp \
     editing/RemoveNodeCommand.cpp \
     editing/RemoveNodePreservingChildrenCommand.cpp \
+    editing/ReplaceNodeWithSpanCommand.cpp \
     editing/ReplaceSelectionCommand.cpp \
     editing/SelectionController.cpp \
     editing/SetNodeAttributeCommand.cpp \