Implement DOM methods: prepend, append, after, before and replaceWith.

third_party/WebKit/LayoutTests/imported/web-platform-tests/dom/nodes/ChildNode-before-expected.txt

-This is a testharness.js-based test.
-FAIL Comment.before() without any argument. child.before is not a function
-FAIL Comment.before() with null as an argument. child.before is not a function
-FAIL Comment.before() with undefined as an argument. child.before is not a function
-FAIL Comment.before() with the empty string as an argument. child.before is not a function
-FAIL Comment.before() with only text as an argument. child.before is not a function
-FAIL Comment.before() with only one element as an argument. child.before is not a function
-FAIL Comment.before() with one element and text as arguments. child.before is not a function
-FAIL Comment.before() with context object itself as the argument. child.before is not a function
-FAIL Comment.before() with context object itself and node as the arguments, switching positions. child.before is not a function
-FAIL Comment.before() with all siblings of child as arguments. child.before is not a function
-FAIL Comment.before() with some siblings of child as arguments; no changes in tree; viable sibling is first child. child.before is not a function
-FAIL Comment.before() with some siblings of child as arguments; no changes in tree. child.before is not a function
-FAIL Comment.before() when pre-insert behaves like prepend. child.before is not a function
-FAIL Comment.before() with one sibling of child and text as arguments. child.before is not a function
-FAIL Comment.before() on a child without any parent. x.before is not a function
-FAIL Element.before() without any argument. child.before is not a function
-FAIL Element.before() with null as an argument. child.before is not a function
-FAIL Element.before() with undefined as an argument. child.before is not a function
-FAIL Element.before() with the empty string as an argument. child.before is not a function
-FAIL Element.before() with only text as an argument. child.before is not a function
-FAIL Element.before() with only one element as an argument. child.before is not a function
-FAIL Element.before() with one element and text as arguments. child.before is not a function
-FAIL Element.before() with context object itself as the argument. child.before is not a function
-FAIL Element.before() with context object itself and node as the arguments, switching positions. child.before is not a function
-FAIL Element.before() with all siblings of child as arguments. child.before is not a function
-FAIL Element.before() with some siblings of child as arguments; no changes in tree; viable sibling is first child. child.before is not a function
-FAIL Element.before() with some siblings of child as arguments; no changes in tree. child.before is not a function
-FAIL Element.before() when pre-insert behaves like prepend. child.before is not a function
-FAIL Element.before() with one sibling of child and text as arguments. child.before is not a function
-FAIL Element.before() on a child without any parent. x.before is not a function
-FAIL Text.before() without any argument. child.before is not a function
-FAIL Text.before() with null as an argument. child.before is not a function
-FAIL Text.before() with undefined as an argument. child.before is not a function
-FAIL Text.before() with the empty string as an argument. child.before is not a function
-FAIL Text.before() with only text as an argument. child.before is not a function
-FAIL Text.before() with only one element as an argument. child.before is not a function
-FAIL Text.before() with one element and text as arguments. child.before is not a function
-FAIL Text.before() with context object itself as the argument. child.before is not a function
-FAIL Text.before() with context object itself and node as the arguments, switching positions. child.before is not a function
-FAIL Text.before() with all siblings of child as arguments. child.before is not a function
-FAIL Text.before() with some siblings of child as arguments; no changes in tree; viable sibling is first child. child.before is not a function
-FAIL Text.before() with some siblings of child as arguments; no changes in tree. child.before is not a function
-FAIL Text.before() when pre-insert behaves like prepend. child.before is not a function
-FAIL Text.before() with one sibling of child and text as arguments. child.before is not a function
-FAIL Text.before() on a child without any parent. x.before is not a function
-Harness: the test ran to completion.
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