Remove CSS regions support, keeping a bare minimum to support "region-based" multicol.

LayoutTests/fast/regions/script-tests/webkit-region-fragment-parsing.js

Index: LayoutTests/fast/regions/script-tests/webkit-region-fragment-parsing.js
diff --git a/LayoutTests/fast/regions/script-tests/webkit-region-fragment-parsing.js b/LayoutTests/fast/regions/script-tests/webkit-region-fragment-parsing.js
deleted file mode 100644
index fa39dfd9d4f102fb8c47ed514dcdeec186cc1003..0000000000000000000000000000000000000000
--- a/LayoutTests/fast/regions/script-tests/webkit-region-fragment-parsing.js
+++ /dev/null
@@ -1,37 +0,0 @@
-description('Tests parsing of webkit-region-fragment property');
-
-var webkitRegionFragmentProperty = "-webkit-region-fragment";
-
-function testCSSText(declaration) {
-    var div = document.createElement("div");
-    div.setAttribute("style", declaration);
-    return div.style.webkitRegionFragment;
-}
-
-function testComputedStyle(declaration) {
-    var div = document.createElement("div");
-    document.body.appendChild(div);
-    div.style.setProperty(webkitRegionFragmentProperty, declaration);
-
-    var contentComputedValue = getComputedStyle(div).getPropertyValue(webkitRegionFragmentProperty);
-    document.body.removeChild(div);
-    return contentComputedValue;
-}
-
-shouldBeEqualToString('testCSSText("' + webkitRegionFragmentProperty + ': auto")', "auto");
-shouldBeEqualToString('testCSSText("' + webkitRegionFragmentProperty + ': initial")', "initial");
-shouldBeEqualToString('testCSSText("' + webkitRegionFragmentProperty + ': inherit")', "inherit");
-shouldBeEqualToString('testCSSText("' + webkitRegionFragmentProperty + ': break")', "break");
-shouldBeEqualToString('testCSSText("' + webkitRegionFragmentProperty + ': 0")', "");
-shouldBeEqualToString('testCSSText("' + webkitRegionFragmentProperty + ': -1")', "");
-shouldBeEqualToString('testCSSText("' + webkitRegionFragmentProperty + ': 12.5")', "");
-shouldBeEqualToString('testCSSText("' + webkitRegionFragmentProperty + ': 1px")', "");
-
-shouldBeEqualToString('testComputedStyle("auto")', "auto");
-shouldBeEqualToString('testComputedStyle("initial")', "auto");
-shouldBeEqualToString('testComputedStyle("inherit")', "auto");
-shouldBeEqualToString('testComputedStyle("break")', "break");
-shouldBeEqualToString('testComputedStyle("0")', "auto");
-shouldBeEqualToString('testComputedStyle("-1")', "auto");
-shouldBeEqualToString('testComputedStyle("12.5")', "auto");
-shouldBeEqualToString('testComputedStyle("1px")', "auto");