Make user-select:none not to affect editability

LayoutTests/editing/selection/5779984-1.html

Index: LayoutTests/editing/selection/5779984-1.html
diff --git a/LayoutTests/editing/selection/5779984-1.html b/LayoutTests/editing/selection/5779984-1.html
deleted file mode 100644
index 08431abd53e02c237302dfd313b681b1716d4f1e..0000000000000000000000000000000000000000
--- a/LayoutTests/editing/selection/5779984-1.html
+++ /dev/null
@@ -1,18 +0,0 @@
-<div id="description">This tests setting the WebkitUserSelect property on a CSSStyleDeclaration.</div>
-<div contenteditable="true" id="test">This text should not be selectable.</div>
-
-<script>
-if (window.testRunner)
-    window.testRunner.dumpAsText();
-div = document.getElementById("test");
-text = div.firstChild;
-if (div.style.WebkitUserSelect == undefined)

[tkent, 2013/06/19 03:50:40]

A test to check existence of style.WebKitUserSelect is missing in new tests of
this CL. Is it covered by other tests?

-    document.write("FAILURE: CSSStyleDeclaration::WebkitUserSelect was undefined.<br>");
-div.style.WebkitUserSelect = "none";

[tkent, 2013/06/19 03:50:40]

Ditto for updating style.WebKitUserSelect.

-s = window.getSelection();
-s.setBaseAndExtent(text, 1, text, 2);
-if (s.type != "None")
-    document.write("FAILURE: Setting -webkit-user-select to none did not have the expected effect. Setting the selection did not fail.<br>");
-    
-document.write("This test passed if you see no failure messages.")
-</script>