The editing/pasteboard/copy-paste-attachment.html layout test is failing since it was added on r180785 (https://trac.webkit.org/changeset/r180785).
@@ -7,8 +7,8 @@
PASS attachment.file.name is 'abe.png'
Perform Cut on the entire selection followed by Paste
Checking the file name for the pasted attachment element
-PASS attachment.file.name is 'abe.png'
+FAIL attachment.file.name should be abe.png. Threw exception TypeError: undefined is not an object (evaluating 'attachment.file.name')
PASS successfullyParsed is true
-This is a paragraph with an attachment and some other text.
+This is a paragraph with an attachment and some other text.