Support arbitrary length units for the z component of CSS property "translate"

third_party/WebKit/LayoutTests/transforms/translate.html

Index: third_party/WebKit/LayoutTests/transforms/translate.html
diff --git a/third_party/WebKit/LayoutTests/transforms/translate.html b/third_party/WebKit/LayoutTests/transforms/translate.html
index 8ba9c745e49fd728e75730dce3bdee8e761df609..09a7b398095aa49565ec880f4feccdd352f22db1 100644
--- a/third_party/WebKit/LayoutTests/transforms/translate.html
+++ b/third_party/WebKit/LayoutTests/transforms/translate.html
@@ -7,7 +7,7 @@ div {
 }
 .container {
     translate: 100px 100px;
-    background-color: red;
+    transform-style: preserve-3d;
     perspective-origin: 150% 150%;
     perspective: 500px;
 }
@@ -18,12 +18,17 @@ div {
     translate: 100% -200% -500px;
 }
 #box3 {
+    translate: 0px 0px 10em;
+}
+#box4 {
     translate: 300px;
 }
 </style>
 
 <div class="container">
+    container
     <div id="box1">1</div>
     <div id="box2">2</div>
+    <div id="box3">3</div>
 </div>
-<div id="box3">3</div>
+<div id="box4">4</div>