chromium/third_party/blink/manual_tests/subview-click-assertion.html

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<p><b>BUG ID:</b> <a href="http://bugs.webkit.org/show_bug.cgi?id=9984">Bugzilla bug 9984</a> ASSERTION FAILURE: _private->mouseDownEvent != nil (WebKit/WebView/WebHTMLView.m:4863 -[WebHTMLView(WebInternal) _delegateDragSourceActionMask])</p>

<p id="test" style="background-color:skyblue; padding:3px;"><b>STEPS TO TEST:</b> 
Open this test in a new Safari window. In the new window, click once on the text &ldquo;Click me&rdquo;. Do not click
anywhere else in the window before clicking the text.
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<p id="success" style="background-color:palegreen; padding:3px;"><b>TEST PASS:</b> 
The text will be deselected.
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<p id="failure" style="background-color:#FF3300; padding:3px;"><b>TEST FAIL:</b>  
An assertion failure will occur.
</p>

<iframe id="frame"></iframe>
<script>
    var win = window['frame'];
    var doc = win.document;
    doc.write("<p id='target'>Click me</p>");
    var target = doc.getElementById('target');
    win.getSelection().setBaseAndExtent(target, 0, target, 1);
</script>

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