Remove display:compact as per https://groups.google.com/a/chromium.org/d/topic/blink-dev/j6QErzkX4R…

LayoutTests/fast/regions/script-tests/region-element-display-change.js

 description("Test that RenderObject is recreated correctly after changing display type.");
 
 function testElement(element, displayType)
 {
         element.style.setProperty("display", displayType);
         // The region element was created if the length of inner text is 0.
     var regionCreated = element.innerText.length == 0;
         return regionCreated;
 }
 
 var element = document.createElement("div");
 var textElement = document.createTextNode("inside element");
 element.appendChild(textElement);
 element.style.setProperty("-webkit-flow-from", "flow");
 document.body.appendChild(element);
 shouldBeFalse('testElement(element, "none")');
 shouldBeTrue('testElement(element, "block")');
 shouldBeTrue('testElement(element, "inline-block")');
-shouldBeFalse('testElement(element, "compact")');
 shouldBeFalse('testElement(element, "inline")');
 shouldBeFalse('testElement(element, "table")');
 shouldBeFalse('testElement(element, "inline-table")');
 shouldBeTrue('testElement(element, "table-cell")');
 shouldBeTrue('testElement(element, "table-caption")');
 shouldBeTrue('testElement(element, "list-item")');
 shouldBeFalse('testElement(element, "-webkit-box")');
 shouldBeFalse('testElement(element, "-webkit-inline-box")');
 shouldBeFalse('testElement(element, "-webkit-flex")');
 shouldBeFalse('testElement(element, "-webkit-inline-flex")');
 // FIXME: Also add grid and inline grid when it is enabled by default
 document.body.removeChild(element);