Remove -webkit-hyphens and -webkit-hyphenate-limit-* properties.

LayoutTests/fast/css/epub-properties.html

 <pre id="console"></pre>
 <script>
     if (window.testRunner)
         testRunner.dumpAsText();
 
     function log(message)
     {
         document.getElementById("console").appendChild(document.createTextNode(message + "\n"));
     }
 
@@ skipping 11 matching lines @@
         if (eval("element.style." + jsName) !== value) {
             log("FAIL: element.style." + jsName + " is not '" + value + "' after setting style to " + element.getAttribute("style") + ".");
             pass = false;
         }
 
         if (pass)
             log("PASS: " + alias + " is an alias for " + name);
     }
 
     testEpubProperty("caption-side", "-epub-caption-side", "captionSide", "epubCaptionSide", "bottom");
-    testEpubProperty("-webkit-hyphens", "-epub-hyphens", "webkitHyphens", "epubHyphens", "manual");
     testEpubProperty("-webkit-text-combine", "-epub-text-combine", "webkitTextCombine", "epubTextCombine", "horizontal");
     testEpubProperty("-webkit-text-emphasis-style", "-epub-text-emphasis-style", "webkitTextEmphasisStyle", "epubTextEmphasisStyle", "open sesame");
     testEpubProperty("-webkit-text-emphasis-color", "-epub-text-emphasis-color", "webkitTextEmphasisColor", "epubTextEmphasisColor", "red");
     testEpubProperty("-webkit-text-orientation", "-epub-text-orientation", "webkitTextOrientation", "epubTextOrientation", "upright");
     testEpubProperty("text-transform", "-epub-text-transform", "textTransform", "epubTextTransform", "uppercase");
     testEpubProperty("word-break", "-epub-word-break", "wordBreak", "epubWordBreak", "break-all");
     testEpubProperty("-webkit-writing-mode", "-epub-writing-mode", "webkitWritingMode", "epubWritingMode", "vertical-rl");
 </script>