Convert execCommand/unlink.html to use w3c test harness

third_party/WebKit/LayoutTests/platform/win/editing/execCommand/unlink-expected.txt

-EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
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-This is a test of execCommand("Unlink"). It tests:
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-Completely unlinking a link.
-Unlinking a single word inside of a link.
-Unlinking a selection containing linked and unlinked text.
-Unlinking a selection that partially selects a linked table.
-The editable regions below describe what their content should be after the test.
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-This paragraph should should end up unlinked.
-The second word in this paragraph should end up being unlinked, everything else should be a link.
-This paragraph starts with a link in the middle. Only the 'a' in the previous sentence should be linked after the test.
-This editable region contains lists, tables, styled text, and images. Everything in this region that is not selected should be a link, nothing that is selected should be a link.
-
-Item 1
-Item 2
-1       2       3
-
-This line contains  an image.
-The innerHTML of editable regions after the test:
-
-This paragraph should should end up unlinked.
-<a href="http://www.apple.com/">The </a>second <a href="http://www.apple.com/">word in this paragraph should end up being unlinked, everything else should be a link.</a>
-This paragraph starts with <a href="http://www.google.com"><i>a</i></a><span id="test3start"> link</span> in the middle. Only the 'a' in the previous sentence should be linked after the test.
-<p>This <i>editable region</i> contains lists, tables, styled text, and images. Everything in this region that is not selected should be a link, nothing that is selected should be a link.</p> <ul> <li>Item 1</li> <li>Item 2</li> </ul> <table border="1"><tbody><tr><td>1</td><td>2</td><td><span id="test4end"><a href="http://www.google.com/">3</a></span></td></tr></tbody></table> <a href="http://www.google.com/"><br> This <b>line</b> contains <img src="../resources/abe.png"> an image. </a>