Unprefix flexbox tests.

LayoutTests/css3/flexbox/multiline.html

Index: LayoutTests/css3/flexbox/multiline.html
diff --git a/LayoutTests/css3/flexbox/multiline.html b/LayoutTests/css3/flexbox/multiline.html
index 29303aa03d1e66a8000ecfdaa69009962807a004..43b4ab504dff7b3bada5f0caf170596cd221c406 100644
--- a/LayoutTests/css3/flexbox/multiline.html
+++ b/LayoutTests/css3/flexbox/multiline.html
@@ -3,13 +3,13 @@
 <style>
 .flexbox {
     position: relative;
-    display: -webkit-flex;
+    display: flex;
     background-color: grey;
     max-width: 600px;
-    -webkit-align-content: flex-start;
+    align-content: flex-start;
 }
 .flexbox > * {
-    -webkit-flex: none;
+    flex: none;
 }
 .title {
     margin-top: 1em;
@@ -33,22 +33,22 @@
     -webkit-writing-mode: vertical-lr;
 }
 .row {
-    -webkit-flex-flow: row;
+    flex-flow: row;
 }
 .row-reverse {
-    -webkit-flex-flow: row-reverse;
+    flex-flow: row-reverse;
 }
 .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;
 }
 .flexbox > :nth-child(1) {
     background-color: #0f0;
@@ -700,7 +700,7 @@ function mainAxisDirection(writingMode, flexDirection)
 function addChild(flexbox, mainAxis, crossAxis, preferredSize, crossAxisLength, expectations)
 {
     var child = document.createElement('div');
-    child.setAttribute('style', '-webkit-flex: 1 0 ' + preferredSize + 'px;'
+    child.setAttribute('style', 'flex: 1 0 ' + preferredSize + 'px;'
         + crossAxis + ': ' + crossAxisLength + 'px;');
 
     child.setAttribute("data-expected-width", expectations[0]);