Unprefix flexbox tests.

LayoutTests/css3/flexbox/multiline-align-content-horizontal-column.html

Index: LayoutTests/css3/flexbox/multiline-align-content-horizontal-column.html
diff --git a/LayoutTests/css3/flexbox/multiline-align-content-horizontal-column.html b/LayoutTests/css3/flexbox/multiline-align-content-horizontal-column.html
index 06393efe9e903f91121a1b5039a7313e7756da62..1d1d9257765cbf0c37507d8d536b09bf4b3bc2bb 100644
--- a/LayoutTests/css3/flexbox/multiline-align-content-horizontal-column.html
+++ b/LayoutTests/css3/flexbox/multiline-align-content-horizontal-column.html
@@ -3,7 +3,7 @@
 <style>
 .flexbox {
     position: relative;
-    display: -webkit-flex;
+    display: flex;
     background-color: grey;
     width: 600px;
     height: 20px;
@@ -24,34 +24,34 @@
     -webkit-writing-mode: horizontal-bt;
 }
 .column {
-    -webkit-flex-flow: column;
+    flex-flow: column;
 }
 .column-reverse {
-    -webkit-flex-flow: column-reverse;
+    flex-flow: column-reverse;
 }
 .wrap {
-    -webkit-flex-wrap: wrap;
+    flex-wrap: wrap;
 }
 .wrap-reverse {
-    -webkit-flex-wrap: wrap-reverse;
+    flex-wrap: wrap-reverse;
 }
 .align-content-flex-start {
-    -webkit-align-content: flex-start;
+    align-content: flex-start;
 }
 .align-content-flex-end {
-    -webkit-align-content: flex-end;
+    align-content: flex-end;
 }
 .align-content-center {
-    -webkit-align-content: center;
+    align-content: center;
 }
 .align-content-space-between {
-    -webkit-align-content: space-between;
+    align-content: space-between;
 }
 .align-content-space-around {
-    -webkit-align-content: space-around;
+    align-content: space-around;
 }
 .align-content-stretch {
-    -webkit-align-content: stretch;
+    align-content: stretch;
 }
 .flexbox > :nth-child(1) {
     background-color: blue;
@@ -236,7 +236,7 @@ function mainAxisDirection(writingMode, flexDirection)
 function addChild(flexbox, preferredSize, alignContent, expected_x_offset)
 {
     var child = document.createElement('div');
-    child.setAttribute('style', '-webkit-flex: 1 ' + preferredSize + 'px;'
+    child.setAttribute('style', 'flex: 1 ' + preferredSize + 'px;'
         + 'min-width: 100px');
 
     child.setAttribute("data-expected-width", alignContent == "stretch" ? "300" : "100");