isContentEditable function is added in http://trac.webkit.org/changeset/19452 to accomplish enclosingNodeOfType(node, &isContentEditable) but this seems to be equivalent to node->isContentEditable() today.
Created attachment 33889 [details] removes the function
Comment on attachment 33889 [details] removes the function My only comment is that the title of this bug could be "isContentEditable function in htmlediting.* can be removed" instead of "must", but that doesn't really matter.
Clarified with Ryosuke. We're only ever using enclosingNodeOfType(node, &isContentEditable) to determine the editability of node. So it's OK to remove.
Landed in http://trac.webkit.org/changeset/46681.