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The method is a noop as we first collect names of shortcut edges and then iterate through all non-shortcuts whose names are also in the collection.

BUG=None

Review URL: https://codereview.chromium.org/204913005

git-svn-id: svn://svn.chromium.org/blink/trunk@169657 bbb929c8-8fbe-4397-9dbb-9b2b20218538